VM 623 

,A4 
1914 
Copy 1 






LIBRARY OF CONGRESS 



021 062 530 6 



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• i . ■■ : 

AM EN GIN I 



VM 623 
.04 
1914 
Copy 1 



GENERALINSTRUCTIONS 

TO '■- .: 

SPECTORS OF MACHINERY 

FOR 

VESSELS OF THE NAVY BUILDING 
UNDER CONTRACT 



19.14 




Book - ri */ 



DEPARTMENT OF THE NAVY 

Bureau of Steam Engineering 

N. S. E. 154 



GENERAL INSTRUCTIONS 

TO 

INSPECTORS OF MACHINERY 

FOR 

VESSELS OF THE NAVY BUILDING 
UNDER CONTRACT 



NAVY DEPARTMENT 
Vft3UREAU OF STEAM ENGINEERING 



4> 



WASHINGTON 

GOVERNMENT PRINTING OFFICE 

1914 



^ v 



\V 



d; of d; 

JIM, 3 <§14 



INDEX OF CORRECTIONS AND ADDITIONS. 

: 
All corrections and additions will be entered on this index and noted 

at paragraph affected. 



Bureau 
file No. 


Serial 
No. 


Subject and date. 


Refers to 

para- 
graph or 
circular 
letter. 



































1 






i 





























































































































































(3) 



INDEX OF CORRECTIONS AND ADDITIONS. 

All corrections and additions will be entered on this index and noted 
at paragraph affected. 



Bureau 
file No. 


S ^ al j Subject and date. 


Refers to 

para- 
graph or 
circular 
letter. 



















































































































































































































(4) 



CONTENTS. 

Part I. 

Page. 

Definition of duties, general requirements, and bureau practice . . 9 

Part II. 
Division of work, organization of force, office requirements 21 

Part III. 
Correspondence, submisssion of drawings, changes 27 

Part IV. 
Division of work, cognizance 46 

Part V. 
Office material, visitors 63 

Part VI. 
Weights 65 

Part VII. 
Tests 67 

Part VIII. 

Division of contract price, payments 72 

Part IX. 
Orders for material 77 

Part X. 
Trials and trial equipment 81 

Part XI. 
Finished drawings and booklet plans 93 

Part XII. 
Corrections and additions, circular letters 95 

(5) 



INSTRUCTIONS TO INSPECTORS OF MACHINERY. 



Navy Department, 
Bureau of Steam Engineering, 

Washington, June 1, 1914- 
The following instructions are issued for the guidance 
of officers and other employees of the Government en- 
gaged in inspection duty under cognizance of the Bu- 
reau of Steam Engineering for vessels of the Navy build- 
ing under contract at private shipyards. As it is impos- 
sible in instructions of this character to cover every case 
that may arise, the bureau relies upon the judgment of 
inspecting officers, the object of the inspection being to 
obtain from the contractors thoroughly good work, as 
required by the specifications. If at any time doubt 
should arise respecting any question, it will be referred 
to the Bureau for decision. 

R. S. Griffin, 
Engineer in Chief, V. S. Navy, 

Chief of Bureau. 

(7) 



Part I. 

DEFINITION OF DUTIES, GENERAL REQUIRE- 
MENTS, AND BUREAU PRACTICE. 

INSPECTOR OF MACHINERY. 

1 . The Inspector of Machinery is the officer ordered by 
the Navy Department as such. 

He shall sign all official correspondence, and shall be 
responsible that all office work is properly performed and 
that the required inspections are properly made. 

He shall make such reports on fitness of officers, en- 
listed men, and civil employees as may be required. 

2. The Inspector of Machinery is the representative 
of the Bureau of Steam Engineering, and as such he acts 
for the bureau, and the bureau will ordinarily be guided 
in its action by the recommendation and decision of the 
inspector. The action of the inspector and his decisions 
and recommendations should therefore be as nearly as 
possible in accordance with the policy of the bureau and 
with the idea of accomplishing the best results from the 
inspection in hand. Cooperation between the bureau and 
inspectors and the fullest interchange of opinion are 
encouraged and desired. 

3. The bureau desires to have the inspector in an 
authoritative position to act for it and to render decisions, 
but desires that such action be in accordance with its 
policy and practice and in accordance with any instruc- 
tions existing, and therefore in all cases the bureau is to 
be fully advised so that a complete understanding of 
matters in hand may always be readily available. 

(9) 



10 

INSTRUCTION OF ASSISTANTS. 

4. As the assignment of junior commissioned officers 
as assistant inspectors is to a large extent an extension 
of their training for future engineering duty, the inspec- 
tor will cause them to pursue such engineering investiga- 
tions that will best serve this purpose and will direct and 
instruct them in all particulars of engineering inspection 
work. 

SUCCESSION OF RESPONSIBILITY. 

5. In the absence of the Inspector of Machinery , the 
senior officer on duty as assistant shall act as inspector, 
and in case of the necessary absence of all officers attached 
to the office one of the civilian employees of the office 
shall be designated by the inspector to carry on the 
necessary work of the office, and sign such papers as may 
be necessary. 

Assistants or civilian employees temporarily in charge 
shall carry on the work in conformity with the orders 
of and the general policy of the inspector of machinery. 

SUGGESTIONS FROM INSPECTORS. 

6. Suggestions of inspecting officers leading to improve- 
ments or desirable alterations in design are invited and 
will receive careful consideration. The inspectors shall 
report all desirable improvements or alterations in work 
or design that may come to their attention. If such sug- 
gestions are not always accepted, officers should bear in 
mind that other considerations not known to them are 
likely to enter into the questions involved. Whenever 
new methods of carrying on work, or special tools, appa- 
ratus, etc., come to the notice of the inspector, such infor- 
mation should be forwarded to the bureau in a report, 
especially when it is likely to be of special value. If in 
the opinion of the inspector any decision of the bureau is 
not to the best interest of the Government, he should not 



11 

hesitate to bring it to the attention of the bureau, stating 
fully the reasons for his opinion. 

INTERCOURSE AND RELATIONS WITH CON- 
TRACTORS. 

7. Inspectors will establish such procedure with refer- 
ence to the contractors as will conduce to efficient inspec- 
tion and expeditious work. Regular and definitely un- 
derstood methods of intercourse should also be estab- 
lished between the inspectors' assistants and the various 
employees of the contractors with whom it may be 
necessary to have dealings. It is specially important 
to secure the cooperation of the contractors and their 
employees, and every effort should be made to remove 
any causes of friction that may develop. The work 
of inspection should be so arranged as to give the con- 
tractors as little delay and extra work as possible, 
while still carrying out thorough inspection and con- 
serving the interests of the Government. 

The terms of the contract, the specifications and the 
approved drawings should be held as inviolate by the 
Government inspectors as by the contractors. They are 
definite agreements between the parties concerned, and 
their strict observance, if carried out with good judg- 
ment, together with firmness and common sense, can not 
do other than secure fair and just treatment to both of 
the contracting parties. 

FAMILIARITY WITH CONTRACTOR'S PLANT. 

8. In order to carry out the above, inspectors should 
make themselves thoroughly familiar with the plant, its 
capacity, its shop management, the means of carrying on 
work and the different methods employed. They should 
know who is responsible for the work from its inception 
to its completion, where all stages of work are done and 
by what means. In general, they should have a complete 
knowledge of the plant and everything pertaining thereto. 



12 

In this way confusion and misunderstanding will be 
avoided, and they will be able to understand both sides 
of any difference that may arise. The inspectors should 
endeavor to aid the contractors in any proper way they 
can, to the end that the work may be done as expeditiously 
as possible. They should confer with the representatives 
of the contractors during the preparation of plans, giving 
contractors such information as may be pertinent and 
necessary in regard to details, arrangement, etc., which 
will in their opinion carry out the bureau's requirements 
in the best way, bearing in mind, however, their position 
which is to see that the terms of the contract are carried 
out, both by the Government and the contractors. 

9. Official dealings with the contractors should be by 
correspondence as far as may be practicable, to secure a 
record of the matter considered and conclusions reached 
for future reference and guidance. 

SOURCES OF INFORMATION FOR INSPECTORS. 

10. The following are the principal sources of informa- 
tion for inspectors in regard to work under construction : 

(1) Circular of requirements for the bidder. 

(2) The contract. 

(3) The specifications and authorized changes. 

(4) The contract plans. 

(5) Type plans. 

(6) Finished working plans. 

(7) Specifications for standard articles. 

(8) General and special orders and circular letters. 

(9) Navy regulations. 

(10) These instructions with corrections to date. 
Other instructions or requirements issued by 

the bureau. 

(11) Good practice. 

(12) Previous practice. 

11. Inspectors should be thoroughly familiar with the 
above and with all conditions pertaining thereto. In 



13 

particular they should understand the contract and have 
a most thorough knowledge of the specifications, both 
the machinery specifications, the specifications for ma- 
terial, and parts of hull specifications relating to the 
machinery. 
THE CONTRACT, ETC. 

12. The contract is the legal agreement between the 
contractors and the Government under which a ship is 
built or certain work is done, and its terms are inviolate- 
It will contain the methods of fulfilling the contract, and 
the conditions under which the work will be done. In 
general it will contain the following information: 

(1) Requirements in regard to plans and the con- 

ditions under which the same may be 
changed. 

(2) Materials and workmanship and means of 

inspection. 

(3) Time of completion and penalty for delay. 

(4) Weight of machinery. 

(5) Trials and performances. 

(6) Acceptance of ship. 

(7) Method of payment. 

CONTRACT PLANS. 

13. The bureau will, in general, furnish the contractors 
with the following contract plans, which shall be fol- 
lowed in the general preparation of detail working plans, 
viz: 

Arrangement of machinery in engine compartments. 
Arrangement of machinery and boilers in boiler 

compartments. 
Arrangement of shafting. 
Main condensers. 

Arrangement of evaporators and distillers. 
Lighting plans. 
Interior communication plans. 



14 

SPECIFICATIONS . 

14. The specifications and authorized changes therein 
will give in comprehensive form the method of construc- 
tion of all work in the shops and on board ship. They will 
give the number of all articles to be supplied and by whom; 
the location of these articles and such detailed informa- 
tion as the bureau is able to furnish. 

STANDARD PIjANS. 

15. All work should conform to the bureau's type plans 
and the material specifications in force at the time of 
signing of contract. The contractors may, however, in 
their discretion, be permitted to furnish material in 
accordance with later plans or specifications if specifically 
authorized by the bureau. Navy Department and 
bureau standards for various parts are designed to secure 
uniformity and interchangeability and reduce the number 
of patterns and spares to be carried. Standard appa- 
ratus should be used whenever possible. If for special 
conditions apparatus differing from standard is neces- 
sary, efforts should be made to use standard arrange- 
ments and dimensions as far as the}^ can be made to apply. 

The bureau's standard sheets and specifications are 
modified from time to time to meet new developments 
and improvements, and great care must be exercised to 
correct the files of standards as soon as new sheets or cor- 
rections are issued. The bureau invites suggestions 
relative to improvements or desirable additions to the 
standard sheets. 

GENERAL REQUIREMENTS FOR WORK, 

16. The contract, specifications, and approved plans 
define what work may be required and limit what the 
Government can obtain. Whether exact character of 
work is definitely defined or not it is the intention to have 



15 

work conform to the best engineering practice. It should 
be understood that at the time of signing the contract 
the Government intends to adopt the practice and methods 
that are in use at that time subject to such improvement 
as the development and elaboration of the plans and 
specifications may reasonably be expected to produce. 

When plans have been approved by the bureau no 
changes will be permitted except by special authorization 
of the bureau unless the arrangement approved develops 
faults on trial when, in order to save time, the inspector 
may authorize the changes required to eradicate the 
faults, reporting immediately to the Bureau the nature of 
the changes and cause them to be entered on the finished 
plans. 

BUREAU PRACTICE. 

17. The inspectors shall familiarize themselves with 
the type plans and all the requirements of the machinery 
specifications for vessels building under their inspection, 
as well as the specifications for the inspection of material, 
the weight instructions, and with the hull specifications as 
far as they affect the machinery installation. They 
should also inform themselves in regard to the latest 
specifications for machinery and hulls for various vessels 
building, specifications for dynamos, electric motors, inte- 
rior-communication instruments, and in general familiar- 
ize themselves with the latest requirements in all matters 
relating to the machinery of naval vessels and other ves- 
sels intended for naval use. They should keep them- 
selves informed regarding bureau practice relative to 
details of the design and construction of machinery not 
specifically covered by the machinery specifications, and 
all information and instructions sent out by the bureau 
from time to time should be carefully read, indexed for 
reference, and the information therein utilized to the 



16 

fullest extent. The bureau will issue requirements of 
bureau practice, circular letters, and bulletins of informa- 
tion from time to time covering various matters. 

FORM FILE. 

18. For the information of the office force and for refer- 
ence, each office will have a properly executed sample 
form of all forms required, filed in a form file for ready 
reference. 

ENGINEERING INFORMATION FILED. 

19. All possible engineering information within the 
scope or opportunities of the inspection office should be 
secured and accessibly filed so as to be of the greatest 
possible use in increasing the professional knowledge of 
the inspection force and the efficiency of the office. 

MATERIALS AND DESIGN. 

20. It is the purpose of the specifications to require the 
most practical and efficient design, material of the best 
quality for the purpose intended, and the highest grade 
of workmanship. Nothing short of these requirements 
should be accepted. This, however, should not be taken 
to mean that the most expensive material or manner of 
workmanship is necessarily to be required, but rather 
that which will conduce to the greatest efficiency of the 
machinery under construction, and which will be to the 
best interests of the Government. 

In considering changes or modifications in the specifi- 
cations, or in deciding matters wherein the inspector's 
decision or action is required, the guiding principle should 
be to render a decision that will be to the best interests of 
the Government and be fair and just to the contractors. 

Where discretionary power is given the inspector, as in 
the following paragraph from bureau's specifications, it 



17 

will usually be found desirable to hold a conference with 
the contractors in order to reach an equitable settlement. 

"Whenever pipes not specified to be lagged with 
metal are exposed to great heat, or where clothing is 
liable to be chafed, the pipes will be lagged with 
metal as directed. " 

INSPECTION OF VESSELS BUILT TO CONFORM 
TO COMMERCIAL, PRACTICE. 

21. Various auxiliary vessels of the Navy are built 
under inspection requirements of classification societies, 
such as United States Steamboat Inspection Service, 
American Bureau of Shipping, Lloyds, etc. The rules 
under which the inspection is to take place are stated 
in the contract, also whether the inspection is to be 
conducted by the inspectors of these classification 
societies or by the naval inspectors. When not so stated 
instructions are sent from the bureau. 

The requiring of such inspection, in lieu of regular 
naval inspection, is usually for the purpose of reducing 
the cost of the vessel by allowing less expensive material 
to be used, and sometimes for the additional purpose of 
obtaining inspection and classification certificates from 
these organizations under which the inspection is con- 
ducted. In order to obtain the inspection or classifica- 
tion certificates the regulations of these classification 
societies often require that the inspection be conducted 
by the inspectors of the society issuing such certificates. 
This, however, does not limit further inspection as may 
be considered necessary or advisable by Government 
inspectors. Vessels building under such rules do not 
require as many detailed tests as are required for regular 
naval work, and in some cases allow the use of material 
of different grade. The workmanship is, however, to be 
first class in all respects and such as will give entire 
satisfaction in operation and durability. 

36161—14 2 



18 

In machinery built under rules of classification so- 
cieties the Navy Department specifications for material 
do not apply, but instead the specifications of the society 
designated. These matters are stated in the contract, 
and its detailed requirements must be carefully read to 
avoid confusion on this point, especially in forwarding 
orders for material to the Inspectors of Engineering 
Material. No material need be inspected at place of 
manufacture except such as is required to be so inspected 
by the rules of the classification society. Such finished 
apparatus as may be specially designated will be inspected 
for workmanship and satisfactory operation at place of 
manufacture. The securing of the necessary certifi- 
cates of classification, inspection, etc., is a matter for 
which the contractors are responsible, these being se- 
cured by contractors and supplied to the Government's 
representatives when the vessel is ready for delivery. 

BEST COMMERCIAL PRACTICE. 

22. The term "best merchant" or "best commercial 
practice" is used in connection with this character of 
work. While this is not absolutely definite, under it 
the bureau expects to receive an installation entirely 
suitable for the purpose for which the vessel is designed. 
While it may not require the most expensive class of 
work used for commercial purposes, it is not, on the other 
hand, to permit of a class of work that is in any way 
questionable or incomplete simply because it can be shown 
that such a character of work has been used commercially. 
It must be equal to the best satisfactory merchant or 
commercial practice. 

Essentially the only difference between this and ma- 
chinery built under the regular requirements of the 
bureau is the use of material of a commercial or lower 
grade and less stringent and detailed testing and meth- 



19 

ods of inspection. The workmanship, strength, and du- 
rability of the apparatus must be of entirely dependable 
character. The machinery specifications for such vessels 
are of a less rigid nature and permit the use of apparatus 
and material of a different character than is usually re- 
quired for regular naval work. These specifications 
state what is and what is not permissible, and the con- 
tractors are not bound to give more than the contract 
and specifications call for except as a change in cost. 

The contractors should be encouraged to construct the 
apparatus in conformity with the bureau standards and 
practice whenever they are willing to do so, and especially 
in cases where the rules of the classification society have 
no requirements covering the feature in question. This 
applies to such items as flanges, bolts, nuts, threads, 
valves, etc. 

REFERENCE TO OTHER INSPECTORS OF MA- 
CHINERY. 

23. The bureau desires to encourage references and ex- 
change of ideas relative to work of inspection among 
various inspectors, and especially in the case of sister 
vessels and where there are several inspectors in the same 
vicinity; and in particular desires to emphasize the 
mutual benefit and increased knowledge and efficiency 
that can be secured by interchange of opinion and infor- 
mation between various inspecting offices. In doing 
this, however, proper regard should be had not to divulge 
private or confidential information of one contractor to 
another without the consent of the contractor originating 
the plan, design, or method of work. 

THE GENERAL INSPECTOR OF MACHINERY. 

24. The General Inspector of Machinery is ordered as 
such by the department. He will from time to time visit 
the various shipbuilding yards where work is being car 



20 

ried on under contracts with the Navy Department. In- 
spectors of machinery will give him access to the records 
of their office with full information covering the methods 
of carrying on the work of inspection, the ratings and du- 
ties of employees, etc. While the general inspector has 
no authority over the inspectors of machinery or the offi- 
cers and civilian employees attached to their offices, he 
may make suggestions to inspectors of machinery with a 
view to bringing about uniformity in the method of car- 
rying on work. His advice should be availed of by the 
inspector of machinery in all matters about which there 
may be any doubt. He will report to the bureau after 
making a visit of inspection, with such recommendations 
as he may deem pertinent. 



Part II. 

DIVISION OF WORK, ORGANIZATION OF FORCE, 
OFFICE REQUIREMENTS. 

DIVISION OF WORK. 

25. The Inspector of Machinery shall divide the work 
among his force having due regard to their rank, rating, 
and ability. They should, as far as possible, be detailed 
for the work that is in accord with their particular abili- 
ties. The aim should be to obtain the highest degree of 
excellence and efficiency from the force as a whole. 

26. The work of inspection will be so arranged that the 
inspector, or one of his assistants, will have direct super- 
vision over all the various details of the machinery in- 
stallation. All finished work must be inspected person- 
ally by the inspector of machinery, or by such assistant 
inspector as may be specifically designated by him, before 
its incorporation into the general structure of the ma- 
chinery. The responsibility for workmanship and sound- 
ness of material rests directly on the inspector, who 
should keep himself in close touch with the actual in- 
stallation and when defects are discovered, or it is found 
that locations can be changed to advantage, he will take 
up these matters with the contractors or with the bureau 
as may be necessary. 

ORGANIZATION OF INSPECTION FORCE. 

27. The organization of the inspection force and their 
detailed duties with the system of office procedure is left 
to the inspector, subject to the various rules and regula- 

(21) 



22 

tions issued by the Navy Department. Inspectors are 
expected to maintain their office and its personnel in the 
most efficient condition possible, and the responsibility 
for securing the best results from the force available will 
rest with the inspector. 

There will usually be included the following: 

Assistant inspectors of machinery, one of whom is 
assigned to the electrical inspection work. 

Drafting force. 

Clerical force. 

Weight-compiling force. 

Outside inspection force. 

ASSISTANT INSPECTORS. 

28. Officers detailed for duty as assistant inspectors 
will make themselves thoroughly familiar with the speci-r 
fications, machinery, and material, and with all work 
assigned to them. They will keep the Inspector of Ma- 
chinery informed of all matters concerning the progress 
of work, inspections, tests, desirable changes or altera- 
tions, unsatisfactory work, etc. They will be prepared 
to furnish the inspector of machinery with complete 
information on any subject concerning their work. 

They will prepare such letters as may be required in 
answer to correspondence that may be referred to them. 

They shall perform such work of inspection as will keep 
them thoroughly cognizant of the progress and quality 
of the work of manufacture and installation and will 
assist in the criticism of all plans and drawings. They 
shall see that all matters coming under their supervision 
are in compliance with the instructions contained herein, 
and will endeavor to gain as much information in regard 
to the methods of work and plans as may be of service 
to them. 

29. Assistant inspectors are assigned partly with the 
idea of giving officers in the lower grades an opportu- 



23 

nity to become familiar with engineering practice, and 
especially with the special features of engineering inspec- 
tion. They will therefore he required to inform them- 
selves concerning the general engineering problems in- 
volved in the building of naval machinery, engineering 
shop practice, and the general matters of inspection 
work, so as to fit themselves for future responsible engi- 
neering duty. 

ELECTRICAL INSPECTOR. 

30. When sufficient assistant inspectors are detailed 
one will be assigned in charge of the inspection w^ork of 
the electric plant and installation. Electrical draftsmen 
or aids will be placed directly under his supervision, as 
well as the gunner (electrical), when one is assigned. 
While the force charged with the inspection of electrical 
installation is in a measure apart, nothing is to be con- 
strued to preclude this force from doing any other inspec- 
tion work whenever occasion arises to make this desirable. 

WARRANT OFFICERS. 

31. Warrant officers who are ordered to duty as assist- 
ants to the Inspector of Machinery shall, in general, per- 
form duty in connection with the outside inspection work. 
They shall, however, perform such other duty as inay be 
required of them by the inspector of machinery, it being 
desired that their practical experience and familiarity 
with the details of the care and operation of machineiy be 
utilized to the fullest extent. 

CIVILIAN EMPLOYEES. 

32. The civilian employees are governed by the civil- 
service rules and departmental orders regarding them. 
They will perform such duties in line with their particular 
qualifications as may be required of them by the inspector. 
The following general divisions are made: 



24 

DRAFTINGS FORCE. 

33. The drafting force shall be utilized in the prepara- 
tion of such drawings, plans, and sketches as may be 
required and in the examination of plans submitted by 
the contractors. They will see that the specifications 
are followed in the preparation of plans, that the strength 
of all material is adequate, and that any special instruc- 
tions for the correction of plans are complied with. 
They shall make themselves familiar with the plans in 
the course of preparation and be prepared to offer such 
criticisms or suggestions as may be pertinent when re- 
quested by the contractors. Any such criticisms or 
suggestions must be immediately reported to the inspec- 
tor. Where no electrical aids are provided, the electrical 
draftsmen should assist in inspection and checking up 
work on vessels and in shops. 

OUTSIDE INSPECTION FORCE. 

34. The outside inspection force will usually be com- 
posed of expert electrical aids, assistant inspectors of 
material, and special mechanics. They shall make them- 
selves thoroughly familiar with the work under construc- 
tion, the quality of material being used, and the methods 
of construction. They will assist in carrying out all 
tests a : nd inspections where required. They shall inspect 
all material received for government work and ascertain 
whether such material has been properly inspected and 
is as represented. No deviation whatever from the plans, 
specifications, and instructions can be authorized by 
them, nor shaJl they give any orders how work shall be 
done. In any case where the contractors have failed to 
follow the requirements of the plans, specifications, and 
instructions, or where incorrect work, or work not up to 
the standard is found, they will see that it is rectified or 
reported to the inspector. 



25 

35. All members of the inspection force are required 
cordially to cooperate one with another and to call atten- 
tion to work that appears to be defective, whether com- 
ing under their direct supervision or not. Xo absolute 
restriction to individual duties will be permitted. 

WEIGHT FORCE. 

36. The weight clerk shall keep an accurate account 
of the weight of all material received on board and shall 
prepare such forms as may be required by the weight 
instructions. 

Every item of finished material coming under the 
cognizance of the Bureau of Steam Engineering shaU be 
accurately weighed and entered in accordance with the 
weight instructions on blanks furnished by the bureau. 
The weights of such other items as are not under the 
cognizance of the Bureau of Steam Engineering, but are 
included in Class V, in the weight instructions, will also 
be obtained and entered as directed. The inspector of 
machinery must familiarize himself with the weight in- 
structions and assure himself that they are carried out. 
Special attention will be paid to see that the classifica- 
tions and groupings are properly made. 

A monthly return of machinery weights will be made 
to the superintending constructor as per NSE Form 106. 

CLERICAL, FORCE. 

37. The clerical force shall keep a proper record of all 
correspondence received or sent and shall see that it is 
properly filed and indexed. The work of the office will be 
directly under the charge of the employee designated by 
the inspector for the duty of chief clerk, who will be re- 
sponsible, under the direction of the inspector, for the 
proper filing, preparation, and handling of correspond- 
ence, and for the issue and carrying out of all general and 
special instructions relating to the office force. 



26 

ADDRESSES. 

38. A record will be kept of the local addresses of all 
persons attached to the office. 

OFFICE HOURS AND HOURS FOR WORK. 

39. Clerical employees and draftsmen will be required 
to adhere to the hours fixed by the department, namely, 
9 a. m. to 4.30 p. m., with half an hour intermission for 
lunch. Special mechanics and laborers wiio are employed 
in mechanical or equivalent occupation are required to 
work eight hours per diem. These hours of work will be 
arranged by the inspector in the manner that will secure 
the best results. 

When for any reason, such as a test, it is necessary to 
have any of the inspector's force present beyond the reg- 
ular hours for work this will be arranged by the inspector. 
Extra or overtime compensation for such cases is, how- 
ever, not allowed by the department. 

RECOMMENDATIONS AS TO RATINGS AND 
ADVANCEMENT. 

40. These should be governed by the circular instruc- 
tions issued from time to time by the department. A 
careful study and strict compliance with such instruc- 
tions is enjoined upon all concerned. Recommendations 
for promotions of the civilian employees will, in the 
ordinary course, be made only after submission of the 
semiannual efficiency reports. 



Part III. 

CORRESPONDENCE, SUBMISSION OF DRAWINGS, 
CHANGES. 

CORRESPONDENCE. 

41. Correspondence should be numbered in accordance 
with some well-defined system, and special attention 
should be paid to see that it is carefully filed and indexed 
so as to be easily accessible for read} 7 reference. 

42. The requirements of the Nayy Regulations and 
Instructions in reference to correspondence will be 
carefully adhered to; in addition the following instruc- 
tions are to be complied with: 

When the letter relates to a nayal vessel, the name of 
the vessel will be given first in capitals, the remainder 
of the subject following. All such letters should be filed 
under ships' heads, letters of each ship being kept 
separate. 

Letters will be briefed as to subject in accordance with 
the schedule furnished by the bureau, which may be modi- 
fied from time to time as new developments maj r make 
desirable. 

43. In briefing letters under " subject " the heads will 
be given first, followed by the subhead, then by the 
particular part referred to. For example: 

DELAWARE: Boilers; internal fittings, dry pipe. 

If the letter does not refer to a naval vessel but to some 
other contract the number of the contract wilt be given 
preceded by the word " CONTRACT" in capitals; 
followed by kind of contract, schedule, etc., as given 

(27) 



28 

below, being either for a bureau S. & A. contract or a 
Navy pay office contract. 

CONTRACT: Bureau S. & A. No. 19127, schedule 6025, class 57, 
items 1, 2, 6, 9; or 

CONTRACT: Pay office, N. Y., No. 611, requisition 1619, class 126, 
items 3, 6, 7. 

When the communication concerns material for stock 
the letter or order in question should have this stated 
under "subject." 

The information outlined above to be given under 
" subject" should also appear on copies of orders for 
material, finished or unfinished, forwarded for inspection. 

44. Separate letters shall be used for each vessel, ex- 
cept that in cases where the subject matter pertains iden- 
tically and completely to more than one v< ssel of a class, 
a single letter with proper and equal mention of the con- 
tract number and name of each vessel to which the sub- 
ject matter applies may be used in order to reduce the 
volume of correspondence. 

Should a single letter applying to more than one vessel 
be used, the letter shall be filed under the head of the 
vessel of the lowest number to which the matter pertains 
and proper reference to this file and letter number made 
on the index card of each other vessel concerned. 

COPIES, EXTRA. 

45. When it is apparent that the correspondence is of 
such nature that it will be referred to other offices where 
a file copy would be desirable, extra copies should be 
made and forwarded, thus reducing the work of copying 
correspondence at the bureau. 

STAMPS ON LETTERS. 

46. The requirements of the naval instructions in 
regard to the placing of stamps and their general use 
must be carefully followed. Various stamps required by 



29 

the bureau must be carefully placed in their designated 
positions in order that such stamps may be readily acces- 
sible when the correspondence is filed. Special care will 
be taken to place on every communication of whatever 
nature received by the inspection office, either for the 
files or passing through the office, a receipt date stamp. 

INDORSEMENTS. 

47. Indorsements are authorized chiefly for the purpose 
of reducing clerical work on matters in question. They 
are not to be considered perfunctory, and must in all cases 
be properly attested by the official responsible for their 
issue. In referring to matter on indorsements the word 
indorsement and not letter should be used. 

INDORSEMENT STAMP. 

48. In forwarding correspondence submitted by the 
contractors the bureau permits the use of an indorsement 
stamp only in cases where no comment is in any way 
necessary or desirable. This stamp is designed to avoid 
clerical work and will be used only in cases where further 
comment is entirely superfluous and unnecessary. This 
indorsement stamp must be placed on the face of the 
letter and in the position that would be occupied by a 
written indorsement, and must be properly signed and 
numbered in each case. 

URGENT MATTERS REQUIRING ACTION. 

49. It frequently occurs that urgent matters requiring 
prompt action do not on the face of the letter indicate 
the urgency conspicuously, as when contractors in their 
letter of transmittal of a drawing request telegraphic 
reply and the request of urgency is not indicated con- 
spicuously. In such cases the necessity for immediate 
action not being readily detected at the bureau, the mat- 



30 

ter is taken up in its turn, when, if the urgency were 
known, the matter would be handled immediately. 
Therefore, in such cases the inspector of machinery will 
indicate in bold type, conspicuously placed, that the 
matter is urgent. Regulation urgent slips will also be 
employed in such cases. (See paragraph 5314, Naval 
Instructions.) 

INSPECTORS' COMMENT ON CORRESPOND- 
ENCE. 

50. The bureau desires especially to impress upon its 
inspectors that in all matters that are referred to them 
the inspectors must fully and clearly submit their com- 
ment and recommendation, and that a definite expres- 
sion of opinion must be stated in each case. The inspec- 
tors are the bureau's representatives, and the bureau re- 
lies upon them to supply it with information and an 
expert opinion on matters involved. 

INCLOSURES. 

51. When inclosures accompany letters, the papers 
will be arranged with the letter on top, and the inclosures 
following in regular consecutive order, the whole being 
secured at the top with a clip or other secure fastening. 
Pins are objectionable. Large tracings, drawings, or 
prints, unless of minor importance, will be forwarded 
under separate cover. They will not be folded, but will 
be rolled and securely wrapped for transmission. 

LETTERS REFERRED TO CONTRACTORS. 

52. When a letter is referred to an inspector requesting 
information, and it becomes necessary to obtain it from 
the contractors, the original letter and other correspond- 
ence must not, unless specifically directed, be forwarded 
to the contractors, but another letter will be addressed 



31 

to them by the inspector calling for the information de- 
sired. In other words, the contractors must not have ac- 
cess to the bureau's or the department's correspondence, 
and only so much of it as may be necessary shall be com- 
municated to them. 

Similarly, in acquainting the contractors with the 
action of the bureau or the department in any matter, 
such action should be communicated by a letter from the 
inspector and not by referring the bureau's or depart- 
ment's correspondence to them, unless specific authority 
to do so is given. 

SUBCONTRACTORS. 

53. All correspondence from the inspector of machin- 
ery or inspector of engineering material at the works of 
subcontractors relating to design, changes, etc., in ma- 
terial or apparatus being manufactured must be for- 
warded through the Inspector of Machinery at the works 
of the contractors for the vessel in question. The in- 
spector wall obtain an expression of opinion from the con- 
tractors before forwarding such correspondence to this 
bureau. This procedure is necessary for the reason that 
the contractor and not the subcontractor is responsible 
to the bureau, and the bureau has no authority to modify 
the arrangements between the contractor and subcon- 
tractor except in so far as making the inspection required. 
Nor can the bureau direct changes or modifications ex- 
cept through the contractors who are the responsible 
parties. These instructions are, however, not to be con- 
strued as restricting the right of any inspecting officer to 
communicate direct with the bureau if he may deem it 
necessary. Correspondence relating to the acceptance 
or rejection of material will be sent to the bureau direct. 



32 

REPORTS. 

54. The following reports shall be submitted to the 
proper authorities at the times indicated. 



To whom sent. 



When made. 



Nature of report. 



Bureau S. E . . . 

Bureau S. E . . . 

Bureau S. E . . . 

Bureau S. E . . . 

Bureau S. E . . . 

Bureau S. E.; 
general in- 
spector of ma- 
chinery. 

Bureau S. E . . . 

Bureau S. E . . . 
Bureau S. E . . . 



Bureau S. E . . . 
Bureau S. E . . . 
Bureau S. E . . . 



Bureau S. E.; 
general in- 
spector of ma- 
chinery. 



Bureau S. E., 
commanding 
officer Comdt. 
delivery yard 
for G. S. K. 

Bureau S. E 



C o m m anding 

officer. 
Bureau S. E 

Trial board 

Trial board 

Trial board 

Trial board 



Yearly. 



Yearly 

Yearly 

Semiannually 
Semiannually 
Monthly 



Monthly . 
Monthly . 



Previous to 
trial of a 



Previous to 

trial of a 
vessel. 

Previous to 

trial of a 



On inspection 



On delivery of 
vessel. 



On delivery of 



On delivery of 

vessel. 

On delivery of 

vessel. 
After delivery . 

On trial of 



On trial of 
vessel. 

On trial of 

vessel. 
On trial of 
vessel. 



Work done during previous year. Report to include 
work under Steam Engineering (machinery) and 
Steam Engineering (electrical). 

Inventory of office equipment. 

Office expenditures for year, including mileage. 

Efficiency reports. 

Recommendations for advancement. 

Percentage of completion of machinery; includes 
Form N. S. E. 102, with a general statement of the 
work done, plans submitted, plans acted upon 
without reference to bureau. 

Percentage of completion of electrical work; includes 
Form N. S. E. 30. 

Number of hours each boiler has been under steam 
during month. 

Corrected copy of machinery specifications and elec- 
trical specifications. 

Synopsis of hull and machinery data, Form 77. 



Drawings, in duplicate, showing location of gauges, 
pyrometers, thermometers, counters, all instru- 
ments for obtaining data on the trials, etc. 

Report of inspection and condition of coal bunkers 
and fuel-oil compartments (made jointly with su- 
perintending constructor). 

List of uncompleted work, with estimated amounts 
to be reserved to cover cost of each item. To in- 
clude drawings, spare parts, tools, etc., required 
by contract and not yet supplied. In brief, every- 
thing not yet supplied by contractor and required 
to complete the contract. 

Inventory of spare parts and tools supplied by con- 
tractors, showing separately items to be carried on 
board and items to be stored at navy yard. 



Number of hours dynamos have been in operation, 
also conditions of running as to amperes, volts, 
pressure, vacuum, etc. 

Remark book. 

Final weight sheets. To include a list of weights 
due to changes. 

Weight of machinery, etc., in accordance with con- 
tract requirements and other instructions from 
the bureau. 

Condition of machinery installation as to proper 
strength, construction and conformity to contract 
requirements. 

Completeness of whole of S. E. installation. 

Itemized lists of uncompleted and unsatisfactory 
work, machinery and electrical, including spare 
parts, etc., not yet furnished by contractors. 



33 



To whom sent. When made. 



Nature of report. 



Trial hoard . 
Trial board . 
Trial-hoard. 



On trial of 

vessel. 
On trial of 



Superintending 
constructor. 

Engineer officer 
of vessel. 

Engineer officer 
of vessel. 



On trial of 

vessel. 
Monthly 



On deliverv of 



On delivery of 
vessel. 



Tests of auxiliaries, with power and water consump- 
tion of same. 

Tabular statement of gauge corrections from com- 
parison with standard gauges. 

Certified setting of boiler safety valves. 

Weight report. 

Special information and data. 

Corrected copy of machinery specifications. 



MATTERS RELATING TO OTHER BUREAUS. 

55. When questions arise affecting matters under cog- 
nizance of other bureaus, or where action by another bu- 
reau is involved, recommendations from the representa- 
tive of the other bureau should be obtained with a view 
to reconciling all differences before forwarding such com- 
munications to the bureau. This procedure must be 
followed whenever practicable in order to avoid the delay 
which sometimes occurs by- reason of such recommenda- 
tions being forwarded directly to the bureau without an 
expression of opinion from the representative of the other 
bureau concerned. 

It is possible that cases will arise in which work under 
this bureau is distinctly predominant and urgent, requir- 
ing immediate action in the premises. In such cases, in 
order to avoid delay, the original will be immediately re- 
ferred to the bureau and a copy- forwarded to the repre- 
sentative of the other bureau for report and recommenda- 
tion in matters under its cognizance. 

Before forwarding to the bureau correspondence in any 
way affecting matters under cognizance of other bureaus, 
a memorandum or indorsement containing an expression 
of opinion from such bureau's representative should be 
obtained. When plans are transmitted that require the 

36161—14 3 



34 

approval of another bureau, a blue-print copy will be for- 
warded for the files of such bureau. 

The foregoing will not be interpreted as restricting the 
right of the inspector of machinery to communicate di- 
rectly with the bureau if he deems it proper to do so with- 
out consulting the representative of other bureaus. 

DRAWINGS AND PLANS. 

56. The inspector will require all plans' to be submitted 
for approval before work is commenced. He will confer 
with the representatives of contractors during prepara- 
tion of plans, giving the contractors such information as 
may be pertinent and necessary in regard to details, 
arrangement, etc., and which will, in his opinion, carry 
out the bureau's requirements in the best way. All 
drawings must be submitted by the contractors with a 
separate letter for each vessel to which such drawings 
apply except as modified by paragraph 44. 

The inspector on receiving such plans will carefully 
examine them as to their agreement with the specifica- 
tions and previously approved plans, and also as to 
excellence of design and arrangement, and will then for- 
ward them to the bureau with a letter of transmittal. 

The letter of transmittal must contain the inspector's 
comments and recommendations and any suggestions for 
improvements, all comment to be as clear and concise as 
* conditions will allow, and a definite expression of opinion 
on the matter in question must be clearly stated in each 
case. 

If no departure from approved plans and specifications 
is found, and if the design meets with the inspector's 
approval, and no other comment is necessary, he may 
forward the matter to the bureau with a signed indorse- 
ment stamp placed upon the original letter of the con- 
tractors, as follows; 



35 

Name of inspection office. 

Date Office letter No 

Respectfully forwarded to the Bureau of Steam Engineering. 
Drawing agrees with specifications. 
Approval recommended . 

Inspector of Machinery . 

This forwarding stamp will be used only in cases where 
further comment is entirely superfluous and unnecessary. 

57. In cases where drawings submitted do not agree 
with the specifications, or for other reasons modifications 
are considered desirable, the inspector will consult with 
the contractors regarding such departures, and will see 
that same are either corrected or that reasons for changes 
and departures are clearly stated in contractors' letter, 
and fully commented upon in the inspector's letter of 
transmittal. This procedure is important, and if strictly 
followed will save much needless correspondence. 

In all cases the inspector will secure for his files, 
before forwarding the original tracing, a blue print of 
each design after stamping, and will retain the duplicate 
letters for same. 

Letters will be forwarded in separate cover from plans, 
except where the latter are of approximately letter-paper 
size. In miscellaneous correspondence, as well as in that 
relating to drawings, separate letters must be written for 
each separate subject or design and for each vessel, if it 
relates to more than one vessel, except as permitted for 
sister vessels building at the same time. 

SUBMISSION OF PLANS. 

58. In the preparation of drawings one set only need 
be prepared and submitted for approval for two or more 
vessels of the same class building at the same yard at 
the same time, except in the possible case of a particular 
matter applying to one or more, but not to all. Where 
tracings are submitted and immediate action is desired 



36 

they should be accompanied by a blue print for the 
bureau 's files, and for plans requiring reference to other 
bureaus, prints should be included for the files of each of 
such bureaus. 

If blue prints are submitted, they will be forwarded to 
the inspector in triplicate, one set to be retained for the 
files of the inspector, one set to be forwarded for the 
bureau's action and file, and one set to be returned 
to the contractors by the inspector. The set for the 
inspector's files and for the contractors will, on receipt 
of bureau's action, be marked hj the inspector with the 
bureau's action and number of bureau's letter. In case 
contractors require additional sets of blue prints marked 
with the bureau's action, the number desired will be for- 
warded by the contractors to the inspector to be marked 
and attested by him. Where the apparatus in question 
is to be furnished by a subcontractor and is to be inspected 
by another officer, the necessary prints for the use of such 
inspecting officer will be secured by the inspector and 
marked with the bureau's action as above and forwarded 
to such officer direct, in addition to the copy which ac- 
companies the copy of the order sent to the bureau. 

The Inspector of Machinery will keep a record of the 
work pertaining to vessels under his inspection which is 
being inspected elsewhere, and will take the necessary 
steps to see that the inspecting officers in each case are 
furnished with the necessary information relative to the 
inspection of the material or apparatus in question and 
with all the approved changes or additions made during 
the course of manufacture. 

When drawings are received in the bureau they will be 
given the bureau's file number for plans. This file num- 
ber will be sent to the inspector of machinery in the re- 
turn letter acting thereon. Thereafter the plan will be 
referred to bv its bureau file number. 



37 

ELECTRICAL PLANS. 

59. In the case of plans for the electric plant, the same 
procedure will be followed, except that blue prints will 
be submitted in quadruplicate. Two of these should be 
forwarded to the bureau, one for its files, and one for 
marking up, if necessary, and return to the inspector with 
correspondence, and to be used in correcting inspector's 
and contractor's copies. 

STANDARD TRACINGS. 

60. In order to avoid the submission of numerous plans 
for fittings and apparatus subject to duplication in ves- 

building by various contractors, the bureau has 
arranged with various manufacturers for the filing at the 
bureau of standard tracings showing their apparatus. 
The rules regarding the submission of these tracings are 
as follow- : 

The manufacturers will submit to the bureau a full 
set of tracings of apparatus in question, type and size of 
which have been approved by the bureau. These trac- 
ings, after having the bureau's approval and its file num- 
ber placed thereon, will be returned to the manufacturer, 
who will take such negative prints as he may desire, after 
which the tracings will be sent to and become the prop- 
erty of the bureau. 

The tracings must be made on best quality of tracing 
cloth, each plan to be 27 by 40 inches and the work to be 
placed on the glazed side of the cloth. Each set of trac- 
ings must include all details and a general-arrangement 
drawing, showing assembly. Each detail drawing must 
show only details belonging to one assembled part, or 
group of similar parts. 

Each plan must show the material of which each part 
is made. This may be included in a bill of material on 
the plan and reference made by numbers or letters; no 



38 

marking or notes, except those pertaining to the design 
of naval work shown on plan, will be permitted. 

Plans will be made to scale, the scale being sufficiently 
large to permit plans being easily examined. All detail 
parts must be completely dimensioned, and assembly 
drawings must show general dimensions. 

In the lower right-hand corner of each tracing there will 
be a space 6 inches high by 3 inches wide left for the 
bureau's approval and filing stamp. 

The bureau's specifications will be strictly followed. 

In order to facilitate the preparation of these plans, the 
bureau will answer any question, furnish blue prints indi- 
cating its requirements, and do all it reasonably can to 
avoid delay. 

The bureau will not require contractors to furnish 
finished tracings of such apparatus for vessels, where the 
above-described plans have been approved and tracings 
filed with the bureau, but will accept, in lieu thereof pos- 
itive reading white cloth Vandyke prints. Such prints 
must be on best-quality cloth about .004 inch thick, 
well shrunken before coating; all lines and dimensions 
must be clear and distinct and there must be no distor- 
tion of the drawing. The cloth must show at least 50 
points on the Mullin paper-testing machine. Reference to 
vessels other than the one for which submitted must not 
appear on such prints. Finished blue prints will be fur- 
nished as required by the specifications. These prints 
will be given new numbers in numbering and indexing the 
finished drawings . The new number will be placed below 
the bureau number of the standard tracing, which number 
will not be erased. 

The bureau will furnish prints for the use of the inspec- 
tors of machinery and material, and will not require the 
contractors to submit for approval more than a letter pro- 
posing the size and general type of apparatus where trac- 



39 

ings of the design are in the possession of the bureau. All 
blue prints required by the contractors for their use must 
be furnished by themselves. 

In case manufacturers propose any change in design at 
any time in one of the plans on file in the bureau, duplicate 
prints with explanatory letter must be furnished after the 
change is finally approved. A correct tracing must be 
furnished, to be approved and filed with the standard et 
in the Bureau. 

REMARK BOOK. 

61. The Inspector of Machinery will keep for each ves- 
sel under his inspection a remark book, in which will be 
entered as they occur — 

Note of any repaired portion of machinery deviating 
from the regular design, and note of any defects or dis- 
crepancies from regular requirements which have been 
made by proper authority. 

Notes on tests or copy of test reports of the machinery 
installed, including hydraulic and steam tests of boilers 
and piping. 

Brief of results of post- trial examination, including a 
complete account of any peculiarities of performance 
observed on the contract trials. 

Record of clearances of principal bearings at time ves- 
sel was run on trial. This should include clearance of 
stern bearings and dummy and thrust clearances in the 
case of turbines. 

Such other available information as may be of use to 
the senior engineer officer of the vessel, such as sizes and 
kinds of packing used in joints, length of time boilers 
have been under steam previous to commissioning. 

A subdivision of remark book will have reference to 
the electric plant and should have such notes on tests of 
electric plant, including interior communication systems 



40 

and instruments as are not incorporated in the record of 
electrical appliances. 

In general, anything concerning the machinery installa- 
tion will be entered that will be of value to the officers 
who will have charge of the machinery afloat. 

This remark book will be forwarded to the commanding 
officer when the vessel is commissioned, and report to 
this effect made to the bureau. 

DEPARTURES FROM SPECIFICATIONS. 

82. In cases where, in the development of design, con- 
tractors deem it advisable to make departures from the 
specifications, they will make application through the in- 
spector of machinery, stating the nature and object of 
the change, accompanied by a full statement of the rea- 
sons therefor and advantages to be obtained. Depar- 
tures from the specifications of minor import not involv- 
ing a material change in design or a change of cost, will 
be acted upon by the bureau and such matters will be 
treated as developments rather than as changes. The in- 
spector will in all such cases make a definite recommenda- 
tion for approval or disapproval. 

Where the matter involves change of cost or is a mate- 
rial change or alteration, it will be treated as a change and 
handled as directed under paragraphs 64, 65, Changes. 

CHANGES AND DEVELOPMENTS. 

63. In working out the details of the machinery and 
electrical installation the contractors have for their guid- 
ance the general contract plans and the specifications. 
These should have been well considered by the bureau and 
by the contractors so that, in order satisfactorily to com^ 
plete the machinery, little departure therefrom will be 
found necesssary or desirable. In some cases it will be 
founds that all parts of a design are not completely cov- 



41 

ered by the specifications, additional details being neces- 
sary to complete the design as a whole. In such cases 
the additional matter will be treated as a development 
involving no change in cost or in penalty weight. This 
is intended to include all incidental apparatus necessary 
to complete the installation or design referred to in the 
plans and specifications. In other cases where different 
arrangements or devices from those specified are employed 
or where an addition, not contemplated by the plans and 
specifications is required, the matter will be treated as a 
change under the contract. 

Developments are matters necessary to the proper com- 
pletion of the system or installation as contemplated in 
the design, and which ma}' at times be included only in 
genernl terms in the specifications. If in a certain sys- 
tem, required by the specifications, some additional 
fitting or device is found to be necessary to insure its 
proper operation, such fitting would not be considered 
as a change but as a development. Modifications in the 
leads of piping to secure a satisfactory arrangement of 
the parts contemplated by the specifications would not 
be considered as a change but as a development necessary 
to complete the whole installation in a satisfactory and 
proper manner. On the other hand the installation of 
new devices, not called for by the specifications, and not 
necessary to secure proper and satisfactory operation as 
contemplated by the contract requirements, or the 
change of an approved satisfactory arrangement into 
one thought to be more desirable to the Government, do 
constitute a change. Broadly speaking, changes com- 
prise modifications of what has been specifically stated 
to be required, or additions to and omissions from what 
is contemplated in the original design. They do not, 
however, include modifications necessary to make the 
installation called for by the contract operate satisfac- 
torily. 



42 

INITIATION OF CHANGES. 

64. Changes in the contract plans and specifications 
may be ordered by the bureau or the department on its 
own initiative, or may be made at the suggestion of the 
contractors. Modifications that do not involve change 
of cost require no further action than approval by the 
bureau. All matters involving a change in cost must 
be referred to the board on changes, and where the 
estimated cost exceeds $500 the change must be author- 
ized by the department, and the report of the board on 
changes must be approved by the department. 

CHANGES SUGGESTED BY CONTRACTORS. 

65. In cases where contractors deem it advisable to 
make a change, they will make application through the 
Inspector of Machinery, stating the nature and object 
of the change, accompanied by complete plans and speci- 
fications of the proposed change, with a statement of the 
amount of increase or decrease in cost and weight. The 
inspector in forwarding such proposed change will care- 
fully investigate the matter, and submit recommendation 
as to the advisability of the change and whether the 
matter should be considered as a change or a develop- 
ment of the plans and specifications. 

ESTIMATE, SUBMISSION OF. 

66. When changes are proposed or the bureau directs 
that estimates for change in cost be submitted from con- 
tractors and from inspectors, the inspector will make 
careful examination and investigation into the matter 
of the cost of the change and submit what, in his opinion, 
is a proper cost of the work under consideration, and the 
bureau's Form No. 17, provided for this purpose, will be 
filled out and transmitted to the bureau, with copy to 
General Inspector of Machinery. 



43 

Should there be a material delay in submitting con- 
tractor's estimate the inspector's estimate will be for- 
warded alone, so as to permit the approval of department 
to be obtained. 

OVERHEAD CHARGE ALLOWANCE. 

67. A proper charge for indirect expenses will be al- 
lowed in estimating items of increased cost, the amount 
to be based on current practice at the plant where the 
change is made and at other plants in that vicinity; but 
not to exceed 50 per cent of the cost of labor and 10 per 
cent of the cost of material unless special or peculiar 
considerations, under authority of the bureau, are to be 
taken into account. A similar allowance will be made 
in estimating items of decreased cost. 

RECORD OF CHANGES. 

68. There will be kept in the office of the inspector of 
machinery for each ship under inspection a special record 
of all proposed changes, showing by whom originated, 
when received by the inspector, when forwarded to the 
contractors, when forwarded to the bureau with estimate, 
when action of bureau or department is received, includ- 
ing a record of amount of increased or decreased cost and 
weight in each case. 

PERSONNEL OF BOARD ON CHANGES. 

69. The general inspector of machinery is the senior 
member of the board on changes. Of the two remaining 
members one will be from the Bureau of Steam Engineer- 
ing, the other usually an inspector or assistant inspector 
of machinery not connected with the work of the yard 
where the board convenes. 



44 

INFORMATION SUPPLIED TO BOARD. 

70. When questions are referred to the board on 
changes the inspector will be informed that such action 
has been taken. The inspector will then collect such 
data as are necessary for consideration by the board, 
including his own and the contractors 7 estimates, with 
such other data as may pertain thereto, and will furnish 
the same direct to the senior member of the board when 
the board meets. He will, after consultation with the 
contractors, inform the general inspector when the mat- 
ter is ready for the board's consideration. When the 
change in question is simple and the cost can be readily 
estimated, it may be acted upon by the board at any 
time after the change is ordered and before the work is 
completed. If, however, the estimates of the contractors 
and the inspector are at variance, the change being of 
such nature as to make exact estimates difficult, or where 
the estimates are much involved, the matter should not 
be considered by the board until after the work is com- 
pleted, unless the change is an omission for which actual 
cost can not be determined. In all cases the contractors 
shall be notified by the inspector in advance of the time 
of meeting of the board and shall be invited to have a 
representative present. The contractors may, if they so 
desire, present for the board's consideration records, re- 
ceipted bills, etc., showing the actual cost of the change. 

PRESENCE OF INSPECTOR AT MEETING OF 
BOARD. 

71. The inspector of machinery must be present in per- 
son to advise the board at all meetings of the board on 
changes. When notified of the date of meeting of the 
board, if he finds it impracticable to be present, he wall so 
inform the senior member, who will, if practicable, set 
another date for the meeting when the inspector can be 
present. 



45 

CONFERENCE WITH CONTRACTORS BEFORE 
SUBMISSION OF CHANGE. 

72. In most instances, before recommending a change, 
it is desirable and in keeping with good business methods 
that the inspector and a proper representative of the 
contractors confer as to the necessity for or desira- 
bility of the change, that the matter may be the more 
clearly presented to the bureau for its consideration and 
decision. The effect of this procedure would tend to 
prevent references of unnecessary changes to the bureau, 
avoid delays in work, and lessen the volume of corre- 
spondence. 

ESTIMATE OF CHANGE, FORM NO. 17. 

73. The estimate of change of cost and weight (Form 
No. 17) which is forwarded to the bureau and to the board 
on changes should be made out in detail, showing the differ- 
ent items included in the change, their material and finish, 
cost of material and labor on each item, the cost of instal- 
lation, drawings, cost of estimates, any work connected 
with the change, and the overhead charges allowed. 
Where a change involves both additions and omissions 
of labor or material, the additions and omissions shall be 
grouped separately on the estimate sheet or placed on 
separate sheets. The inspector or acting inspector will 
sign or initial the estimate sheet and will enter thereon 
in the remark colr.mn the contractors' estimate. 



Part IV. 

DIVISION OF WORK, COGNIZANCE. 

WORK UNDER OTHER BUREAUS. 

74. The inspector of machinery will keep himself 
informed on the work under other bureaus whenever the 
execution of same has any bearing on the performance 
or accessibility for overhauling or repair of any part of 
the machinery or other work under this bureau. In 
this connection the inspector will be particular to ex- 
amine into the following: 

Arrangements of fire main and salt and fresh water 
service generally. Drainage systems, including special 
floor drainage of machinery spaces. Location and fitting 
of reserve feed tanks, fuel-oil tanks, and location and 
accessibility of sea connections. 

Water-tight subdivision in machinery spaces and the 
location of doors for access. Matters in connection with 
the proposed arrangement and fitting up and ventila- 
tion of machinery spaces, coal bunkers, machinery store- 
rooms, engineer's office, machine shop, refrigerator and 
ice-machine rooms, blower rooms, evaporator rooms, 
drum rooms, engineer's wash rooms. Particular atten- 
tion should be paid to the air-supply arrangement for 
forced-draft blowers and the arrangement for supplying 
air to fire rooms under natural draft. Access to and 
between various machinery spaces, including arrange- 
ment of elevators, hatches, ladders, etc., stowage, ar- 
rangements for spare parts and supplies, location of valve- 
lifting apparatus on deck. 

(46) 



47 

75. Inspectors should pay special attention to see that 
adequate foundations and attachments to hull are built 
for auxiliary engines, especially for blowers and pumps, 
as there are numerous cases in which engines have been 
thrown out of line and damaged by reason of foundations 
or attachments not being sufficiently rigid. Whenever 
defects of this character come to the knowledge of the 
inspector they will be reported to the bureau, with the 
inspector's comment and recommendation. 

76. With special reference to the duties of the engi- 
neer officer afloat, the inspector will use his best endeavor 
to secure the most efficient arrangement of steam and 
other machinery in all parts of the vessel, and will con- 
sult freely with inspecting officers in direct charge of the 
work. He will be careful to secure for all mechanism 
and pipes installed by this bureau, outside of machinery 
spaces, the best possible lead and location and also the 
best arrangement of smoke-pipe guys. Wherever, in 
his judgment, work done under other bureaus injuriously 
affects the efficiency of any installation of this bureau 
he will call the attention of the proper inspecting officer 
to such point and, if necessary, submit report to this 
bureau for its further action. 

DIVISION OF WORK BETWEEN BUREAUS. 

77. Inspectors should be careful to inform themselves 
on the accepted lines of cognizance between the different 
bureaus, and avoid as far as possible any confusion and 
unnecessary controversy relative to this matter. The 
bureau desires to impress upon its inspecting officers the 
necessity for familiarizing themselves with the parts of 
the machinery, piping, and general outfit of vessels now 
conceded to be under the cognizance of this bureau. 

The bureau will furnish inspectors from time to time 
with information concerning decisions relative to ques- 



48 

tions of cognizance of work, and all such communications 
will be carefully filed and rendered accessible for reference. 

78. Parts under cognizance of the Bureau of Steam 
Engineering at the present time are generally covered by 
the machinery specifications for each vessel and enumerated 
in the bureau's weight instructions. The only places 
where doubt may arise as to whether parts are under cog- 
nizance of this bureau or another bureau are at points of 
intersection of work under different bureaus. Depart- 
ment's decision affecting one such case is as follows: 

xill parts that may be considered as immovable, at- 
tached or fixed to the hull, and properly forming a part 
thereof, to be under the cognizance of the Bureau of Con- 
struction and Sep air; and the several other parts that 
may be considered as movable, not attached or fixed to 
the hull, to be under the cognizance of that other bureau 
to which they pertain according to the various provisions 
of the regulations. 

REMOVABILITY OF FITTINGS. 

79. A further decision of the department is as follows: 

The Bureau of Steam Engineering shall have discre- 
tionary power to designate which of the supports, brack- 
ets, or fixtures as pertain exclusively to its work should 
be made portable, and such portable fixtures, etc., shall 
be furnished and fitted by and be under the cognizance 
of the Bureau of Steam Engineering, with the proviso 
that the integrity of water-tight bulkheads, double bot- 
toms, etc., shall be preserved, by riveting such fixtures 
etc., as must of necessity be attached thereto. 

80. As it is absolutely necessary to avoid any arrange- 
ment of fittings that will prevent free access at all times 
to all parts of the machinery spaces, and the ready removal 
of all supports for floor plates or piping, the bureau desires 
that all such work be carried out hereafter so that the 
features of removability shall be in all cases retained, 
except where it would of necessity interfere with the 



49 

water-tightness of bulkheads, and even in such cases 
riveted lugs will be applied, to which removable supports 
can be fitted by this bureau with bolts and not with rivets. 
The same general idea will govern other fittings where 
controversy might otherwise arise, as this bureau's con- 
trol must be inclusive and definite over all such supports 
connected with the machineiy installation that are not 
essentially immovable parts of hull attachments. 

COGNIZANCE OF WORK. 

81. The following is a resume of principal matters 
affecting cognizance. The full decisions have not been 
quoted as many of them are long and much involved; but 
all essential points to date are covered therein. 

Notes on Cognizance of Wokk. 

GENERAL LINE OF DIVISION. 

82. In general, all parts covered by the machinery 
specifications are under cognizance of the Bureau of 
Steam Engineering. This includes the boilers, uptakes, 
and smoke pipes; the main engines with all attachments 
and all auxiliary machinery pertaining thereto; all steam 
pumps, wherever placed or for whatever purpose; all 
steam and exhaust piping and valves; steam-pressure reg- 
ulators; radiators for heating ship; steam traps; water 
piping in engine and fire rooms, except drain pipes con- 
necting different compartments; and risers on fire and 
flushing mains from pumps, up to and including the valve 
on main. The location of radiators and leads of piping 
outside of machinery spaces must be satisfactory to the 
Bureau of Construction and Repair. In general, the cog- 
nizance of the Bureau of Steam Engineering ends with 
parts that are bolted to the hull structure. Parts that 

36161—14 4 



50 

are riveted to the hull are under cognizance of the Bureau 
of Construction and Repair. This rule places the founda- 
tions for the machinery, boilers, and steam engineering 
auxiliaries under the cognizance of the Bureau of Con- 
struction and Repair. They are, however, made to the 
satisfaction of the Bureau of Steam Engineering. 

The following specific questions of cognizance have 
been decided by the department, or agreed upon by mu- 
tual consent of the bureaus: 

ENGINE AND FIRE ROOM VENTILATION. 

83. Ventilators in engine and fire rooms are under the 
cognizance of the Bureau of Construction and Repair, 
but must be satisfactory to the Bureau of Steam Engi- 
neering. Ventilating blowers are under the cognizance 
of the Bureau of Construction and Repair. Forced draft 
blowers are under cognizance of the Bureau of Steam En- 
gineering. The movable automatic shutters, on forced 
draft blower discharges, for regulating the distribution or 
pressure of air, are under the cognizance of the Bureau of 
Steam Engineering. (Bu. S. E. 47726-131-10; C. & R. 
17697-E. 4.) 

DRAINAGE SYSTEM. 

84. The main and secondary drains and all branches 
thereof, are under the cognizance of the Bureau of Con- 
struction and Repair. When manifolds are fitted joining 
the suctions from main and secondary drains, inner bot- 
toms, or other compartments, these manifolds are also 
under cognizance of the Bureau of Construction and Re- 
pair. The steam pumps, the pump suction manifolds, 
independent bilge suctions in boiler rooms, engine rooms 
and shaft alleys, the connection from the flanges on the 
construction and repair manifolds, or from the flanges on 
the main and secondary drains, where such manifolds have 



51 

not- been fitted, are all under cognizance of the Bureau of 
Steam Engineering. (Bu. S. E. 1220-Y; 1317-YY.) 

85. Independent bilge suctions to two or more com- 
partments partake of the nature of a secondary drain and 
are under cognizance of the Bureau of Construction and 
Repair. (Bu. S. E. 84807-625.) 

Where drainpipes connecting different compartments 
are not fitted and there are suctions from each compart- 
ment leading to manifolds in such compartment, these 
suctions are under the Bureau of Construction and Repair. 
(Jupiter case Bu. S. E. 69415-251-15.) 

FRESH WATER SYSTEM. 

86. The general fresh water system, including tanks, 
filling pipes, distributing pipes, etc., is under the cogni- 
zance of the Bureau of Construction and Repair. When 
pumps in the general fresh water system are operated by 
steam they are under the cognizance of the Bureau of 
Steam Engineering. Such pumps when operated by 
other means are under cognizance of the Bureau of Con- 
struction and Repair. The piping for handling the water 
in reserve feed tanks is under cognizance of the Bureau of 
Steam Engineering. The only exception to this is in the 
case of the fresh water filling pipe, ordiuarily fitted to lead 
from overboard to the reserve feed tanks. The portion 
of this pipe outside of the machinery space is under the 
cognizance of the Bureau of Construction and Repair, 
which bureau supplies a flange just inside the machinery 
space, the piping from this point on being under the cog- 
nizance of +he Bureau of Steam Engineering. (Bu. S. E. 
1220-Y; 1317-YY, Dept. 8580-57 Jan. 30, 1904.) 

87. Distiller connections to trimming tanks on destroy- 
ers: the Bureau of Steam Engineering has cognizance 
over parts in machinery spaces. The Bureau of Con- 



52 

struction and Repair has cognizance over other parts. 
(Bu. S. E. 61421-625.) 

88. All bath water heaters are under the cognizance of 
the Bureau of Construction and Repair, but the steam 
and drain connections are under cognizance of the 
Bureau of Steam Engineering. A simple steam jet in a 
sink or bathtub is under cognizance of the Bureau of 
Steam Engineering. 

REDUCING AND STOP VALVES. 

89. Reducing and stop valves in steam to steering 
engine are under cognizance of the Bureau of Steam 
Engineering. (Bu. S. E. 76153-329-20.) 

SEA CONNECTIONS AND VALVES BELONGING 
THERETO. 

90. When leading to steam engineering pumps these are 
under cognizance of the Bureau of Steam Engineering. 
Any sections of such piping that are riveted to bulkheads 
or to the ship's side and are thus made a permanent part 
of the hull are under the Bureau of Construction and 
Repair. Zincs for protecting the hull at outboard con- 
nections and on shaft struts and stern tubes are under 
the Bureau of Construction and Repair. Zincs on shafts 
or attached to outboard bearing shells are under the 
Bureau of Steam Engineering. Strainers over sea injec- 
tions belong to that bureau which has cognizance over 
the part to which they are bolted, but the area through 
strainer must be satisfactor}^ to that bureau for whose 
purpose the injection is fitted. 

BULKHEADS— WATER-TIGHT JOINTS. 

91. All piping, engine braces, or other parts under 
cognizance of the Bureau of Steam Engineering that 
pierce water-tight bulkheads must be fitted at the bulk- 



53 

head to the satisfaction of the Bureau of Construction 
and Repair. Any fittings for the attachment of bulk- 
head stuffing boxes, etc., that are riveted to bulkheads 
are under the cognizance of the Bureau of Construction 
and Repair. 

FLOOR PLATES, LADDERS, GRATINGS, ETC. 

92. Engine and fire room floor plates, ladders, and 
gratings below the level of the protective deck are under 
cognizance of the Bureau of Steam Engineering. If on 
line with or above the protective deck, they are under the 
Bureau of Construction and Repair. Platforms and 
gratings fitted for attention to distillers or machinery in 
hatches are under the Bureau of Steam Engineering. 
The supports for such of these fittings as are under Steam 
Engineering are also under Steam Engineering if they 
are bolted to the hull structure. If riveted to the hull 
structure the} r are under the Bureau of Construction and 
Repair. The Bureau of Steam Engineering has dis- 
cretionary authority to say winch of the supports for 
floor plates shall be made portable. All ladder rounds on 
bulkheads are under cognizance of the Bureau of Con- 
struction and Repair. 

SHAFT STRUTS AND STERN TUBES. 

93. Shaft struts and stern tubes are under cognizance 
of the Bureau of Construction and Repair. They are 
bored out and stern bearings and bushings are fitted by 
the Bureau of Steam Engineering. Removable fair 
waters around shafting, on the bosses of struts, and at 
stern tubes are fitted by Steam Engineering. 

REFRIGERATING MACHINERY. 

94. Refrigerating machinery for ice making and for 
cooling cold storage and magazine spaces is under cog- 
nizance of the Bureau of Steam Engineering. This in- 



54 

eludes all dense air piping for machines of the air type 
and all piping for carrying refrigerant, as well as the cold 
brine piping for other machines, with pumps, valves, lag- 
ging, instruments, etc. Cooling water pipe connections 
to fire mains are under the Bureau of Construction and 
Repair. For magazine cooling the Bureau of Construc- 
tion and Repair is, jointly with the Bureau of Steam 
Engineering, responsible for determining the capacity 
and location of the machines. 

AIR-COMPRESSING MACHINERY AND PIPINQ. 

95. Air compressors for charging torpedoes are under 
cognizance of the Bureau of Ordnance. Air-compressing 
machinery for all other purposes except in submarines 
when used for adjusting and diving under cognizance of 
the Bureau of Steam Engineering. Air reservoirs and 
air piping in the machinery spaces are under the Bureau 
of Steam Engineering. When air-compressing machinery 
under the cognizance of the Bureau of Steam Engineering 
is placed outside of the machinery space, the cognizance 
of the Bureau of Steam Engineering includes the air 
compressors themselves, the engines or motors for driving 
them, with all steam and exhaust pipes, valves, gauges, 
forced lubrication system complete, safety valves, and 
fittings. If the circulating water is taken from the fire 
main, the connections are under cognizance of the Bureau 
of Construction and Repair. If from an independent 
pump or pump attached to the machine they are under 
the Bureau of Steam Engineering. All air pipes outside 
of machinery spaces, including both suction and dis- 
charge connections to air compressors and reservoirs, are 
under the Bureau of Construction and Repair. 



55 

ASH EJECTORS, EXPELLERS, AND PIPING. 

96. The general location, so far as concerns the piercing 
of bulkheads, decks, ship's side, etc., must be arranged to 
the satisfaction of the Bureau of Construction and Repair. 
The size of piping, general arrangement and location of 
openings in the ship's side or bottom, must be satisfac- 
tory to the Bureau of Steam Engineering. The Bureau 
of Steam Engineering has cognizance over the installa- 
tion and over all parts not permanently attached to the 
hull of the vessel. Short sections of piping, riveted to 
bulkheads, or to ship's side, and forming a permanent 
part of hull, are under the Bureau of Construction and 
Repair. 

TANKS, ETC. 

97. All large tanks used for the storage of water and 
fuel oil are under the Bureau of Construction and Repair; 
this includes fuel oil settling tanks. Tanks for the stor- 
age of steam engineering supplies, such as lubricating 
oil and waste, and other tanks that constitute an integral 
part of any installation under cognizance of the Bureau of 
Steam Engineering are under the cognizance of that 
bureau. For example, the feed tanks, filter tanks, the 
drain and settling tanks in a forced lubrication system 
and the testing tank used in connection with the dis- 
tilling plant are under the Bureau of Steam Engineering. 

Feed and filter tanks are under cognizance of the Bu- 
reau of Steam Engineering in all cases. The Bureau of 
Construction and Repair will be consulted as to the loca- 
tion, method of securing, etc., of feed and filter tanks in 
those rare instances in which they are permanently fas- 
tened to the ship. Whenever the permanent ship's 
structure is so utilized, however, the Bureau of Construc- 
tion and Repair is to retain cognizance of the integrity 



56 

and preservation of such portions of the tanks as are a 
part of the permanent structure of the ship. The de- 
partment's decision in this case is based upon the peculiar 
circumstances of the case and forms an exception to the 
general rule concerning parts permanently attached to the 
ship's structure. {Nebraska decision — Bu. S. E. 57137- 
308-8-Dept. 10875-81, Apr. 23, 1912.) 

COMBINED HEATING AND VENTILATING. 

98. The ventilating pipe, including box for steam coil 
with its size and location, is under cognizance of the 
Bureau of Construction and Repair. The steam coil 
and its connection to steam-piping system is under cogni- 
zance of the Bureau of Steam Engineering. (Bu. S. E. 
13396-C; 13041-CC.) 

SMOKE-PIPE GUYS. 

99. Are under cognizance of the Bureau of Steam 
Engineering but will be located jointly by the inspector 
of machinery and superintending constructor. 

FUEL.-OIJL SYSTEM. 

100. Storage tanks, settling tanks when in the nature 
of a permanent storage tank, and all filling pipes not 
connected to Steam Engineering pumps are under cogni- 
zance of the Bureau of Construction and Repair. All 
suction pipes, pumps, valves, manifolds, pressure pipes 
and valves and burners are under cognizance of the 
Bureau of Steam Engineering. All pipes that serve 
both as suction pipes and filling pipes are under the 
Bureau of Steam Engineering. 

On destroyers where filling pipes are fitted as suction 
pipes for use with the vessel's fuel-oil pumps, the part 
within the machinery space is under the cognizance of 
the Bureau of Steam Engineering, while the deck fitting 
and part above deck is under cognizance of the Bureau 



57 

of Construction and Repair. (Bu. S. E. 13833-EE; C&R 
23942-E. 25 to 28.) On larger vessels, where the filling 
pipes are brought into the machinery spaces and connect 
to the suction manifolds under Steam Engineering, the 
Bureau of Construction and Repair has cognizance up to 
and including the flange connecting to manifold. (See 
Specifications for Fuel-Oil System on recent ships.) 

BULLETIN BOARDS— ENGINE-ROOM DESKS. 

101. These are classed as equipage and are under cog- 
nizance of the Bureau of Construction and Repair. 

SUBMARINES. 

102. The Bureau of Steam Engineering has cognizance 
over the engine, shafting, and propellers, with their bear- 
ings and accessories. It also has cognizance over the 
dynamo or motor, storage batteries, and electrical appa- 
ratus. The air compressors and pumps, other than those 
required to operate the engines, are under cognizance of 
the Bureau of Construction and Repair. 

STEAM LAUNCHES. 

103. The Bureau of Steam Engineering has cognizance 
over the boiler, engine and all accessories, shafting, bear- 
ings, propeller, all piping, valves and other attachments 
necessary for the proper installation and working of the 
propelling machinery, pumps worked by power other than 
hand, and the portable flooring around propelling ma- 
chinery. The tank under boiler, if fitted, is under the 
Bureau of Steam Engineering. In general, the division 
follows the same lines as on a large vessel. 

MOTOR BOATS. 

104. The Bureau of Steam Engineering has cognizance 
over the propelling machinery or motor, with all shafting, 
bearings, propeller, all piping, valves and other attach- 



58 

ments necessary for the proper installation and working 
of the propelling machinery, pumps worked by power 
other than hand, and the portable flooring around pro- 
pelling machinery. (Bu. S. E. 15465-2; Dept. 20353-3 
of Sept, 14, 1903.) 

ENGINE COUNTERS. 

105. Are under cognizance of the Bureau of Steam En- 
gineering. Department's eighth indorsement No. 15-27, 
of June 24, 1905, gives the Bureau of Construction and 
Repair cognizance of Taylor counters until developed to 
the satisfaction of the trial board, its subsequent installa- 
tion for trial purposes to be made under the cognizance 
of the Bureau of Steam Engineering. Department's 
fifth indorsement No. 3740, of February 2, 1906, author- 
ized the Bureau of Construction and Repair to provide 
additional Taylor counters for use on the Pacific coast, 
that bureau having certified that this counter was still 
undeveloped. 

ELECTRICAL WORK. 

106. The following parts of the electrical equipment 
come under the cognizance of the Bureau of Steam Engi- 
neering: 

107. Generating sets with engines or turbines complete, 
switchboards, wiring and conduit, lamps, and accessories; 
portable electric fans, searchlights, night-signal sets, tele- 
phones, electric bells, testing apparatus, radio apparatus, 
thermostats, tools for electric plant, storage batteries, 
dry and wet batteries, all electrical apparatus for interior 
communication, except battle-order transmission appa- 
ratus and range finders, but not excepting wiring. 

This includes all electrical apparatus, except motors and 
their control apparatus for operating machinery under 
cognizance of other bureaus and such other apparatus as. 



59 

lias been placed under other bureaus by decisions of the 
department. 

CONDUIT, ETC. 

108. The Bureau of Steam Engineering is responsible 
for the supply and installation of electric wiring on ves- 
sels of the Navy, including conduits and fixtures, it being 
understood that the plans for the installation as far as 
they involve securing the strength and water-tightness of 
bulkheads, the size and location of holes in bulkheads, 
deck beams, and other integral parts of the hull (and any 
interference with the installation of other material) are 
subject to the approval of the Bureau of Construction 
and Repair. (Bu. S. E.- 43673-625; Dept. end. of June 
29, 1911.) This does not apply to wiring and conduit 
between motors and their controlling appliances which 
are under cognizance of the bureau having cognizance 
over the motor. (Dept. end. 18282-6 of Sept, 11, 1911.) 

VOICE TUBES, PANELS, ETC. 

109. Voice-tube panels for mounting call bells, push 
buttons, and annunciators in connection therewith are 
entirely under cognizance of the Bureau of Steam Engi- 
neering as far as relates to cost and changes of cost. 
Voice tubes, voice-tube terminal boxes, mouthpieces, etc., 
are under cognizance of the Bureau of Construction and 
Repair as regards cost and changes of cost. (Bu. S. E. 
36821-726, Jan. 5, 1912.) All means of mechanical sig- 
nal communication except engine and fire room telegraphs 
are under the Bureau of Construction and Repair as re- 
gards cost and changes of cost. (Bu. S. E. 5096-625.) 
Voice-tube panels include all cases where there is calling 
apparatus and voice-tube terminal boxes refer to cases 
where there is no calling apparatus. (Bu. S.E. 51855-768.) 



60 

ILLUMINATING SETS. 

110. The illuminating outfit under cognizance of the 
Bureau of Steam Engineering includes the illuminating 
set complete, with braided cotton cord or steel-wire rope, 
as the case may be, also the sister hooks and turnbuckles 
attached to same. (Bu. S. E. 5166-290-5— Dept. 19344- 
49 of Nov. 10, 1911.) 

ELECTRIC SEMAPHORE FOR SIGNALING. 

111. The mechanical features are predominant and 
place this apparatus under cognizance of the Bureau of 
Construction and Repair. (Bu. S. E. 72820-71 1-2-L.) 

GYRO COMPASSES. 

112. Gyro compasses, including motor generators, fuse 
panels, starting panels, and switchboards, are under 
cognizance of the Bureau of Navigation. The wiring and 
conduit in connection with the instrument are under the 
Bureau of Steam Engineering. (Bu. S. E. 57418-604.) 

ELECTRIC WATER HEATER. 

113. Electric water heater for ship's barber is under 
cognizance of the Bureau of Construction and Repair. 
(Bu. S. E. 62925-625.) 

COMBINED OIL AND ELECTRIC LIGHTING 
FIXTURES. 

114. Combined oil and electric lighting fixtures are un- 
der cognizance of the Bureau of Steam Engineering. 

DISTRIBUTION PANEL ON SUBMARINES. 

115. Distribution panel on submarines is under cog- 
nizance of the Bureau of Steam Engineering, although 
containing switches for operating a motor belonging to the 
Bureau of Construction and Repair. (Bu. S. E. 37167- 
497.) 



61 

AEROPLANES. 

116. The power plant, design, construction, installa- 
tion, and repair are under Steam Engineering. This in- 
cludes the engine, starter, shafting, propeller, radiator, 
cooling system, oil system, carburetor, gas leads and con- 
nections, muffler and exhaust 'piping, ignition system, 
magneto, generator if used for starting or ignition, igni- 
tion or starting batteries, shafting and gearing driven by 
main engine or its auxiliaries operating machinery under 
cognizance of other bureaus up to the gear or coupling 
directly connecting with such machinery; oil pumps, 
piping and reservoirs, main and auxiliary fuel tanks and 
piping, water, fuel, and oil gauges, fuel, lubricating oil 
bearings, brackets and supports for Steam Engineering 
installations which do not form an integral part of the 
structure; whistle and engine control signals. The con- 
trols for engines, including levers, pedals, push rods, or 
leads, including lead blocks or tubes, are under Steam 
Engineering, but the location of controls and leads to be 
satisfactory to the Bureau of Construction and Repair. 
(S. E. No. 75466-736.) 

GENERAL WORKSHOP. 

117. The Bureau of Construction and Repair fits up the 
shop, supplying all equipage, including work benches, tool 
and gear boards, lockers, drawers, shelves, wrench racks, 
foundations for tools, including drip pans if placed on the 
foundations, and tanks for oil and waste. The plans for 
and disposition of all such equipage must be satisfactory 
to the Bureau of Steam Engineering. The Bureau of 
Steam Engineering supplies all tools, both hand and 
power, including all motors, control apparatus, shafting, 
and belting. 



62 
BLACKSMITH SHOP. 

118. The Bureau of Construction and Repair fits up 
the shop, supplying all equipage, including work benches, 
racks, lockers, shelves, and drawers for storing tools and 
stores, tanks for water and fuel oil, and coal bins, etc., 
and foundations for tools installed by the Bureau of Steam 
Engineering. The arrangement of such equipage must 
be satisfactory to the Bureau of Steam Engineering. 
The Bureau of Steam Engineering supplies the forges, 
anvils, blocks, and tools permanently installed in the 
shop. 

FOUNDRY. 

119. The Bureau of Construction and Repair fits up 
the shop, supplying all equipage, including sand boxes, 
tanks for fuel oil, coal bins, if required, lockers, racks, 
shelving, etc. The arrangements must be satisfactory 
to the Bureau of Steam Engineering, which supplies 
furnaces, crucibles, and all tools and accessories used in 
the foundry. 



Part V. 

OFFICE MATERIAL— VISITORS. 
OFFICE JOURNAL. 

120. An office journal will be kept, in which shall be 
entered the following information: 

Reporting of officers for duty. 

Detachment of officers, appointment of boards, and 
meetings and sessions of boards. 

Appointments and change in office force. 

Visits of distinguished officials. 

Stoppage of work on account of strikes, etc. 

Any important matters relating to machinery of ves- 
sels under inspection, such as dates of important tests, 
dock trials, accidents, and othfcr important items. In 
particular any item of information having a direct bear- 
ing on any possible claim of the contractors for delay in 
the execution of a contract will be fully entered. 

The journal' will be examined and signed by the in- 
spector of machinery at the end of each week. 

OFFICE OUTFIT AND FURNITURE. 

121. General requisitions for office supplies (appropria- 
tion: " Increase of the Navy, construction and machin- 
ery") must be submitted semiannually in June and 
December, in order that the matter may be taken up at 
the time and correspondence relative thereto be reduced 
as much as possible. Additional requisitions should only 
be made for such supplies as could not have been foreseen 
when the regular semiannual requisitions were submitted. 

The bureau desires that office equipment, etc., should 
be of the most approved character and that all apparatus 
which will aid in the economical carrying on of the work 
be secured. The bureau, however, does not favor the 

(63) 



64 

purchase of costly apparatus the need for which is not 
pertinent and when the service derived does not bear a 
proper proportion to the outlay necessary. Strict econ- 
omy and special care should be exercised in the issue and 
use of office supplies and instruments. Recommenda- 
tions from inspectors concerning improvements in office 
facilities, equipment, etc., will receive special consider- 
ation. 

Inspectors will submit at the end of each calendar year 
a list of equipment in their respective offices, and the con- 
dition of the same, together with comments in reference 
to changes or additions which may be considered 
desirable. 

VISITORS. 

122. The department's instructions concerning visitors 
to vessels under construction are to be carefully complied 
with, and the contractors will be specially instructed 
concerning these requirements in order that confidential 
information concerning characteristics of machinery and 
apparatus may not be divulged to unauthorized persons. 

In general, no visitors will be allowed to go on board 
vessels of the Navy under construction except by permis- 
sion of the senior naval officer present, and no such 
permission shall be given anyone not known to be an 
American citizen of good standing and repute. In case 
visitors are permitted to go on board any vessel under 
construction, they shall be accompanied, if practicable, 
by an officer or other responsible person attached to the 
office of the inspector. In no case will unauthorized 
persons be given permission or permitted to take photo- 
graphs or make sketches of the machinery or installation 
on board without authority from the bureau, or the Navy 
Department, and whenever photographs are taken on 
board, the department's instructions in that regard as 
applying to naval vessels will be strictly observed. 



Part VI. 

WEIGHTS. 

WEIGHTS OF MACHINERY. 

123. To carry out the provisions of the contract, and 
of that portion of the United States Navy Regulations 
relating to weights of machinery, every item of finished 
material coming under cognizance of the Bureau of 
Steam Engineering must be accurately weighed and 
entered, in accordance with the weight instructions, on 
blanks furnished by the bureau. The weight of such 
other items as are not under cognizance of the Bureau of 
Steam Engineering, but are included in Class V in the 
weight instructions, will also be obtained, if practicable, 
and entered as directed. The Inspector of Machinery 
must f amiliarize himself with the weight instructions, and 
assure himself that they are carried out in the classifica- 
tions, groupings, and all other aspects. A monthly 
return of machinery weights will be made to superin- 
tending constructor as per form N. S. E. 106. 

WEIGHTS OF CONTAINED WATER. 

124. The provisions of the contract, with respect to the 
weight of contained water, will be strictly followed. The 
weight of water wall be calculated for the temperature 
corresponding to trial condition, and will include the 
weight of steam in boilers and pipes. In entering the 
calculated weight of water in the weight sheets, the tem- 
peratures employed in the calculations, corresponding to 
each item, will be noted. 

36161-14 5 (66) 



66 

CENTERS OF GRAVITY, 

125. In filling in the distances called for in the columns 
locating the centers of gravity of the machinery parts, 
great care will be exercised to obtain these distances as 
correctly as possible. The same lines, or planes of ref- 
erence, will be used throughout the weight sheets. 

FINISHED WEIGHTS. 

126. The finished-weight sheets will be forwarded to 
the bureau as soon after all work is completed as pos- 
sible. The report required in paragraph 167a is for the 
purpose of determining the approximate penalty weight 
of machinery for preliminary settlement. The penalty 
weight will be finally determined by the bureau after the 
finished- weight sheets have been received. 

With the final weight sheets will be included a state- 
ment showing in detail increased or decreased weight due 
to authorized changes in machinery including electrical 
changes. 



Part VII. 

TESTS. 

TESTS OF MATERIAL. 

127. Tests of unfinished material are for the most part 
made by the Inspector of Engineering Material of the dis- 
trict where the material is manufactured, but in all cases 
where material is manufactured at the building yard the 
inspector of machinery will make the inspection and con- 
duct the tests as required by the specifications for ma- 
terial. 

TESTS AND CHEMICAL ANALYSES. 

128. The bureau has regular forms for making records 
of tests of material and chemical analyses, and the inspec- 
tor of machinery will, in all cases where either tests or 
chemical analyses are made of any material, make a rec- 
ord of same on such forms as the bureau furnishes, for- 
waiding copies to the bureau. 

WAIVERS OF MATERIAL. 

129. In case of waivers of material the bureau has a 
regular form of waiver card which will be submitted to the 
bureau properly filled out either for its approval or with a 
statement on same showing that a waiver was granted by 
the inspector of machinery where it was of such b char- 
acter that he felt satisfied in making a waiver. 

TESTS OF MACHINERY. 

130. The various parts of the machinery will be sub- 
jected to such hydraulic and steam tests before installa- 
tion as are required by the specifications and directions 

(67) 



given by the bureau. The inspector will require the 
arrangements and methods of testing to be made to his 
satisfaction, and will keep a record of such tests. 

PRESSURE TESTS ON SHORE. 

131. The Inspector of Machinery must be present at 
the hydraulic and steam tests on shore of the boilers, con- 
densers, and cylinders. The accuracy of all test gauges 
must be satisfactorily established, and the test must be 
properly applied. Measurements must be carefully taken 
before, during, and after the tests, so that any deforma- 
tion indicating general or local weakness will be detected. 

TESTS OF APPARATUS. 

132. All auxiliary machinery will be tested in general 
to determine its satisfactory installation and to ascer- 
tain if the requirements of the specifications as to strength, 
capacity, and operation are met. These tests should be 
made if possible previous to the preliminary trial of the 
vessel. The data for curves of horsepower and revolu- 
tions of auxiliaries required for the use of the trial board 
should also be taken at the time such apparatus is tested. 

133. In connection with these tests the following gen- 
eral instructions are given: Special requirements and fea- 
tures as to tests of particular apparatus are given in the 
contract and specifications. Other details will be given 
at such time as the apparatus is acted on by the bureau. 
The following matters of information are given to guide 
inspectors in making and reporting these tests. 

FORCED DRAFT BLOWERS. 

134. These will be tested by operating each set before 
preliminary trial to demonstrate proper assembling and 
adjustment. The details of requirements for tests of 



69 

capacity, etc In 

connection with the I >ut of bl 

boiler con ter- 

mined a:, th superintcndr _ : any 

deficit i he matt 

BOILERS. 

". Boilers will I ad teste 

required by the - 

both 
hydraulic and steam ation 

will : - in order to determh 

rkmanship. 
Id 

- fall in louts with pump 

off will be noted and recorded in n A 

p of more ) per cei 

will 1 

EVAPORATING PLANT. 

his test is made to demonstrate the ci and 

also for determining any defects in installation, arrange- 
ment, and operation. If arrangemen it is 
desired that the water from red to deter- 
mine the steam consumption of the plant. Test reports 
should include the fol data, in addition rt of 
:ity : 

- in coils and ah 

of circul: ejection and : 

feed water, distilled water, evaporator room, ou tsi 
Double strokes, circulating pump, feed pump, ited 
Quality of water in gra gallon. More than 

two grains per gallon will not be considered satasfact 



70 

CIRCULATING PUMPS. 

137. These may be tested either before or after instal- 
lation on board, provided the necessary apparatus and 
facilities for carrying out all the requirements of the 
specifications for tests can be complied with. The water 
consumption of pump engine should be obtained and re- 
ported wherever required, and in other cases if possible. 

REFRIGERATING PLANT. 

138. This test should be run at least 24 hours unless 
otherwise specified. The time to cool the refrigerat- 
ing chambers should be noted at frequent intervals. 
Several batches of ice should be frozen and the time for 
freezing noted. The horsepower of the machine will be 
determined if practicable and careful observations of the 
temperature of the discharge and temperature of the re- 
turned air or other cooling medium obtained. Observa- 
tions will also be made of the time for rise in temperature 
of the refrigerating chamber with cooling medium cut off, 
in order to determine the efficiency of the insulation. 

139. Tests to fully indicate the cooling ability of the 
refrigerating apparatus supplied for magazine refriger- 
ation will be made, the specific requirements being con- 
tained in the specifications. 

TESTS ON BOARD. 

140. The Inspector of Machinery or authorized assist- 
ant will be present at the hydraulic and steam tests on 
board, to see that they are properly carried out, and that 
the results are satisfactory. Particular attention must be 
paid to the tightness of all joints subject to either steam 
or exhaust tension, both in pipes and connections. 



71 

ELECTRICAL TESTS. 

141. Besides the inspection of work in the course of 
construction and erection, the following tests shall be 
held on all electrical work: 

(1) 48-hour test on generators. 

(2) Searchlight tests. 

(3) Motor tests. 

(4) Insulation tests. 

(5) Interior communication tests. 

These tests are described fully in the following enumer- 
ated advance sheets and specifications and subsequent 
corrections, additions, and changes. 

Advance Sheet No. 18, of February 16, 1909, with 
modifications. 

Specifications for installing electric plants and means of 
interior communication, included in ships 7 specifications. 

INSULATING TESTS. 

142. The insulating resistance of circuits operating on 
less than dynamo voltage may be measured at a pressure 
of 125 volts, voltmeter method, or an ohmmeter may be 
used. 

MOTORS FOR MACHINE TOOLS. 

143. Machine tools shall be tested after installation by 
operating the tool at full capacity for approximately one 
hour. The following features should be noted: 

(1) Start and stop several times with and without 
load at high and low speed and note motor input both 
starting and steady. 

(2) Note variations in speed, also heating by ther- 
mometer after about one hour full machine load at full 
field speed. 

(3) Note convenience of controlling appliances; on 
lathes exceeding 6 feet between centers, the controller 
should be on lathe carriage. 



Part VIII, 

DIVISION OF CONTRACT PRICE, PAYMENTS. 

DIVISION OF CONTRACT PRICE; ALLOTMENT 
FOR MACHINERY. 

144. When the contract for the construction of a vessel 
has been signed, a copy of such contract will be furnished 
the inspector of machinery, together with the contract 
plans and specifications for the vessel. The Inspector of 
Machinery will then request the contractor to designate 
what portion of the contract price he desires to allot for 
parts covered by the machinery specifications. This will 
be submitted to the bureau for its approval. The 
inspector of machinery mil, in consultation with the con- 
tractors, then subdivide the amount so approved among 
the several items on Bureau of Steam Engineering Form 
102, which form will contain columns showing for each 
item the estimated weight of material, the amount allot- 
ted for material, the amount allotted for labor, and the 
total of the amounts for material and labor. In the 
preparation of this subdivision of the machinery allot- 
ment, special care will be exercised by the inspector to 
see that excessive amounts are not allotted to material 
or to items which are completed during the early stages 
of construction. The form, when approved by the 
bureau, will be used as the basis for monthly reports of 
progress on the vessel, as well as the special reports ac- 
companying applications for payments. 

MONTHLY REPORT OF PRO ORES S. 

145. At the end of each month a report will be made by 
the inspector of machinery showing the progress of the 
work for each vessel building under his inspection. This 

(72) 



73 

report will state in detail the work of the previous month, 
and will include such data as the Inspector of Machinery 
may possess relative to prospective launching, tests, 
trials, etc. It will contain full information concerning 
causes of delay in the progress of work, such as an insuffi- 
cient number of workmen, strikes, delays in receipt of 
materials, etc. The report will conclude with the inspec- 
tor of machinery's estimate of the percentage of comple- 
tion of the machinery at the close of the month. Accom- 
panying the report will be a report on Form 102 and 
Form 2, " Report of installation of electric plant. " 

146. After the delivery of a vessel to the Government 
monthly reports of progress, Form 102, need not be sub- 
mitted, but about the first of each month and until the 
vessel is finally accepted, a letter will be forwarded for 
each vessel stating all items of unfinished work with the 
percentage of completion. 

APPLICATIONS FOR PAYMENT. 

147. In order to carry out the department's instruc- 
tions regarding the successive payments to contractors, 
the following papers relative to the contractors' applica- 
tion for each payment will be forwarded to the bureau: 

(a) Notice from the contractors that they have made 
application for a payment. 

(b) Statement in detail from the contractors, giving 
the amount included in the above application as due on 
machinery and cost of material and labor furnished. 

(c) Special report on Form 102. 

(d) Joint letter, signed by the Superintending Con- 
structor and Inspector of Machinery, containing recom- 
mendation in case. 

(e) Evidence, such as shall be submitted by the con- 
tractors, in compliance with the department's instruc- 
tions, contained in its letter No. 5969-03, of July 1, 1903, 
that there are no liens or rights in rem against the vessel 
on which such payment is asked for or the material on 



74 

hand therefor that would interfere in any way with the 
rights of the Government in any event that may arise 
under said contract. 

(/) Report in triplicate, Form 88. 

(g) Affidavit showing that eight-hour law has been 
observed in construction of vessel and machinery in 
cases where this law applies. 

If the boilers for the vessel are building under sub- 
contract, the following additional papers will be included: 

(h) Copy of the latest monthly report from the inspect- 
ing officer at the works of the subcontractors for boilers ; 
giving the percentage of completion of boilers and amount 
earned for boiler work. 

(i) Copy of certificate from subcontractors, as to per- 
centage of contract price paid on boilers by the con- 
tractors. 

(j) Additional insurance policies on boilers, payable to 
the Secretary of the Navy, covering the amount for which 
payment on boilers by the Government is requested. If 
these policies have been previously forwarded, the num- 
ber and date of letter forwarding them will be given. 

148. The contractor's bill, in quadruplicate, will be 
forwarded by the Superintending Constructor to the 
Bureau of Construction and Repair. 

CREDIT FOR MATERIAL. 

149. In making reports of progress and special reports 
accompanying applications for payment, Inspectors of 
Machinery will not give credit for material ordered from 
subcontractors until after its delivery at the building 
yard. This does not apply to the boilers when building 
under subcontract, for which credit may be given as the 
work progresses, as provided in paragraphs 148 and 151. 

ANNUAL REPORT. 

150. A special annual report will be made as soon a3 
practicable after the end of each fiscal year on the prog- 
ress of work on the machinery of each vessel during the 



75 

previous fiscal year. This report is required for use in 
preparing the annual report of the chief of bureau. It 
should be accurate and concise, and should be arranged 
under the following general headings, each vessel being 
given a separate sheet: 

(a) Name of ship, date of contract, date to be 

completed, contract price, name of con- 
tractors, percentage of completion from 
which and to which the work on machinery 
has advanced during the year. 

(b) Items of machinery that have been completed 

and installed. 

(c) Items of machinery that have been erected in 

shops and are ready for installation. 

(d) Items of machinery that are under way. 

(e) Probable date of completion. 

These general headings should be supplemented by 
any others that are deemed of sufficient interest to 
warrant mentioning in the annual report of the chief 
of bureau, but a list of changes in the original plans 
will not be included unless questions of special impor- 
tance are involved. 

BOILERS BUILDING UNDER SUBCONTRACT. 

151. In cases where the boilers for a vessel building 
under contract are being built by parties other than the 
contractors, and the contractors desire that payment 
shall be made by the Government on account of the 
boilers, as the work progresses, the following procedure 
will be followed: 

The contractors will allot for such portion of the 
boiler work as is done at the works of the subcontractors 
a portion of the contract price which must be approved 
by the bureau. The inspecting officer at the works of 
the subcontractors will then be directed to submit to the 
Inspector of Machinery for the vessel monthly reports 



76 

showing the percentage of progress on the boilers. 
Copies of these reports will be furnished to the con- 
tractors, who, in order to obtain credit for the boiler 
work, must furnish the inspector of machinery with 
certificates from the subcontractors, showing the pro- 
portion of the contract price that they have paid on the 
boilers. Insurance, payable to the Secretary of the 
Navy, must be effected on the boilers to the amount for 
which payment by the Government is requested, and the 
policies must be forwarded through the inspector of 
machinery to the bureau for deposit in the office of the 
Solicitor. When a payment is requested, papers will be 
forwarded in accordance with the instructions in para- 
graph 147, 148. 

BEQUEST FOR EXTENSION OF TIME OF DE- 
LIVERY. 

152. These requests will be submitted through the In- 
spector of Machinery and the Superintending Constructor 
and in forwarding such requests inspectors will comment 
fully upon all matters bearing on the delay mentioned, 
in order that the bureau may be fully advised of all cir- 
cumstances in making its recommendation to the de- 
partment. 

In making recommendations in this matter the wording 
and intent of the contract should be fully considered. 
Contractors are expected to have full knowledge of the 
practicability of their design and have control of their 
workmanship. Hence delays due to improper design 
and workmanship and failure, of the apparatus provided 
by the contractors to pass tests are, generally speaking, 
not delays that warrant an extension of time. 

In this matter, however, it is the intent of the bureau 
to give contractors equitable consideration and each case 
must necessarily be decided on its merits. 



Part IX. 

ORDERS FOR MATERIAL. 

UNFINISHED MATERIAL. 

153. On the receipt of contractors' orders for finished 
or unfinished material, the inspector of machinery will 
forward two copies of such order, with inclosures, direct 
to the inspector of engineering material in the district 
where the material will be manufactured and one copy 
to the bureau. Forwarding stamps of design supplied 
by the bureau will be placed in the upper left-hand corner 
on the reverse side of each copy of order, these being 
properly filled in according to requirements of stamp. 
The three copies must each have on them the name of 
the ship for which intended, and if not for a ship the infor- 
mation as to the bureau or Navy pay office contract as 
provided for, for the "subject." A copy of each order 
for material to be inspected on delivery will be forwarded 
to the Bureau of Steam Engineering in the same manner 
as orders to be inspected at place of manufacture. The 
proper stamped form will be used for forwarding and no 
indorsement or letter forwarding copy to the bureau will 
be required and no copy of plans will be forwarded 
except such as may be needed for the proper inspection 
of material ordered. The Inspectors of Engineering 
Material have authority to make the inspection without 
specific orders from the bureau. Any change in the speci- 
fications that may be approved by the bureau subse- 
quently will be communicated by the Inspector of Ma- 
chinery to the Inspector of Engineering Material and the 
bureau in the same manner as the original order. 

(77) 



78 

154. Before forwarding orders inspectors will exercise 
care to see that they specify definitely what is called for. 
Specifications or parts of specifications referred to should 
be exactly designated; in case leaflet specifications are 
used reference should be made to same by number and 
date. 

If composition metal is ordered it should be designated 
by the symbol standing for that composition. 

155. The bureau will decide upon the final acceptance 
of material that does not fulfill the requirements of the 
specifications. In the case of the transfer of an order 
to another inspection district notice will be sent to the 
original district requesting that the copies of the order 
be forwarded to the new district, and a carbon copy of 
such notice will be sent by the Inspector of Machinery to 
the new district and one to the bureau. In the case of 
changes in, revocation, or cancellation of orders duplicate 
notices will be sent to the inspection office concerned and a 
carbon copy thereof to the bureau. The inspection office 
receiving notices of the transfer of an order so as to 
require inspection in another district will promptly 
forward the copies of the order transferred to the inspec- 
tion office of the district to which transferred. Atten- 
tion is called to the general specifications for inspection 
of material. When blue prints or other information on 
separate sheets is required for inspection, one copy will 
accompany each copy of order sent out by the Inspector 
of Machinery, either to the Inspector of Engineering 
Material or the Bureau of Steam Engineering. 

FINISHED MATERIAL. 

156. Where finished material is to be ordered by con- 
tractors from other firms, detail drawings, cuts, and 
specifications, such as will enable the bureau to obtain 
a complete knowledge of the requirements, must be sub- 



79 

mitted to the bureau for its approval. After such ap- 
proval is given, if inspection is to be made at the place of 
manufacture, two copies of the order will be forwarded 
to the Inspector of Engineering Material and one to the 
bureau, as elsewhere specified, and inspection will be 
made in the same manner as for unfinished material. 
Copies of approved drawings necessary for inspection 
must accompany each copy of order for the use of the 
inspection officer and the bureau. 

157. All auxiliary machinery and fittings will, where 
practicable, be inspected during construction at the place 
of manufacture. In the case of other finished material, 
where inspection at the building yard is authorized, the 
Inspector of Machinery will, on its receipt, make such in- 
spection in accordance with approved drawings and 
specifications. Copies of an order for all finished as well 
as unfinished material that is to be inspected on delivery 
will be forwarded to the bureau with the proper forward- 
ing stamp on the back of order as elsewhere directed. 
This should apply only where examination and visual 
inspection alone is required, or where the inspection can 
be more efficiently conducted at the shipyard than by a 
representative sent from the office of the Inspector of 
Engineering Material. 

INSPECTION OF MATERIAL BEFORE APPROVAL 
OF DRAWINGS. 

158. Inspection of material, when requested by the con- 
tractors, may be ordered previous to the approval of de- 
tail drawings for apparatus in which such material is to be 
used, at the contractors' risk only, subject to final ap- 
proval of the drawings or details of the apparatus in 
question. The proper stamp filled in on back of copies 
of orders should indicate this condition. Credit for such 
material, when received at the building yard, will not be 
given until such drawings or details are approved. 



80 

MATERIAL, REJECTED AT THE BUILDING YARD. 

159. It must be understood that all material, whether 
finished or unfinished, is subject to inspection at the 
building yard by the Inspector of Machinery and will be 
rejected by him if found unsuitable for installation, 
whether it has been previously passed by another officer 
or not. 

Where such material has previously passed inspection 
at the place of manufacture a report giving in detail the 
reasons for such rejection will be immediately forwarded 
by the Inspector of Machinery through the Inspector of 
Engineering Material, who passed such material, to the 
bureau. 

In the case of steel castings the Inspector of Engineering 
Material must be furnished with heat and serial numbers 
of condemned castings. 



Part X. 

TRIALS AND TRIAL EQUIPMENT. 
TRIAL EQUIPMENT. 

160. The inspector will take measures to see that the 
various trial equipments required by the contract and 
specifications and by orders from the bureau to be fitted 
on vessels during their trials shall be installed in a 
thoroughly satisfactory manner. 

Directions for the installation of other apparatus for 
use on trial, such as special counters, recording gauges, 
thermometers, will be given by the bureau previous to the 
trial, and care should be taken to secure the best possible 
location and installation of this apparatus for the pur- 
pose of securing data. After trials care will be taken to 
prevent any damage to trial equipment belonging to the 
Government. 

CALIBRATION OF TORSION METERS. 

161. This will be carried out carefully in accordance 
with special instructions and directions for the type of 
torsion meter installed. All data as to constants, re- 
sults of calibration, etc., should be reported to the bureau ; 
in duplicate, at least two weeks previous to the date of 
trial. As the correctness of data obtained for use in 
future designs depends directly upon the accuracy of the 
torsion meters, the need of absolute accuracy in calibra- 
tion and installation of this apparatus is manifest. A de- 
scription of the means taken for calibrating the shafts will 
be forwarded to the bureau for approval. If the type of 

36161—14 6 (81) 



82 

torsion meter permits it, the calibration of shafts should 
be made with torsion meter in place on the shaft. 

WATER-MEASURING ARRANGEMENTS. 

162. Special care is to be taken that the water-measur- 
ing arrangements are such as to secure reliability and ac- 
curacy as well as reasonable facility for operation. The 
measuring tanks must be carefully calibrated, and in the 
piping arrangements care must be taken that all water 
which should be measured passes through the measuring 
tanks. Make-up feed water must not pass through meas- 
uring tanks. The water-measuring apparatus will be 
tested to demonstrate its suitability previous to de- 
parture of vessel for official trials. 

ARRANGEMENTS FOR MEASURING FUEL. 

163. The inspector will see that suitable arrangements 
are provided by the contractors for measuring coal or oiJL 
on all trials where fuel consumption is required. When 
necessary such devices will be checked for accuracy. 

BUILDERS' TRIALS. 

164. On all builders 7 trials of a vessel, including dock 
trials, the Inspector of Machinery or commissioned assist- 
ant must be present. He will report to the bureau the 
results of such trials, with copies of the data obtained if of 
sufficient importance. 

READINESS FOR PRELIMINARY TRIAL. 

165. When the contractors for a vessel consider that 
they are ready for the official speed trial called for under 
the contract, they will request such trial in writing to the 
Secretary of the Navy, through the Inspector of Machinery 
and Superintending Constructor. Before approving such 
request it must be shown that the vessel is complete in all 
respects, except final painting and such other work as 



83 

will be injured on the trial. The Inspector of Machinery 
will report to the bureau regarding such completion, 
together with his recommendations. 

SPARE PROPELLER BLADEvS. 

166. Spare propeller blades will not be cast until after 
the trial, when the bureau will be consulted regarding the 
dimensions of blades desired. 

REPORTS TO TRIAL BOARD. 

167. When the board for the trial of a vessel is ordered 
the Inspector of Machinery will furnish it with reports, 
stating : 

(a) The weight of the machinery, including the water 
in the boilers, surface condensers, and other parts of the 
machinery, in accordance with the contract, as nearly as 
can be ascertained at the time cf preliminary trial. This 
statement will include separately the weight of machinery 
installed; of machinery, spare parts, etc., which remain 
to be installed or placed on board; the weight of water 
in machinery as per contract. It will also include a state- 
ment of the weight placed on board of temporary instru- 
ments and apparatus, to be removed after the trials. 

(6) Whether the machinery, including the engines, 
boilers, and appurtenances, is strong and well built and 
in strict conformity with the contract, drawings, specifi- 
cations, and duly authorized changes. 

(c) Whether the machinery, including the engines, 
boilers, appurtenances and spare parts, is complete in 
accordance with the contract, drawings, specifications, 
and authorized changes therein. If it is not so complete 
your report will include a detailed list of all the items 
whicli are incomplete. 

(d) The synopsis, Bureau of Steam Engineering Form 
77, filled out with the machinery data for the vessel. 



84 
A sample letter of instruction in this matter is as follows : 

February 5, 1913. 
Inspector of Machinery. 
Subject: Texas; Preliminary Trial: Instructions to In- 
spector of Machinery. 

1 . On the official trials of the Texas you are informed 
that you or one of your assistants will be required to 
report to the trial board when it assembles for the pur- 
pose of furnishing the board with any information that 
it may require. 

2. You will furnish the board with all the information in 
your possession, including items of unfinished work, and 
afford it every facility for the examination of the plans and 
papers relating to this vessel, and will render the board all 
the assistance it may require in the performance of its 
duties. You are directed to furnish the board with a 
report (11 copies) which will include the following infor- 
mation (first copy to be carbon backed for blue printing) : 

(a) The weight of the machinery, including the water 
in the boilers, surface condensers, and other parts of the 
machinery, in accordance w^ith the contract, as nearly as 
can be ascertained at the time of preliminary trial. This 
statement will include separately the weight of machinery 
installed; of machinery, spare parts, etc., which remain 
to be installed or placed on board; the weight of water 
in machinery as per contract. It will also include a state- 
ment of the weight placed on board of temporary instru- 
ments and apparatus, to be removed after the trials. 

(b) Whether the machinery, including the engines, 
boilers, and appurtenances, is strong and well built and 
in strict conformity with the contract, drawings, specifi- 
cations, and duly authorized changes. 

(c) Whether the machinery, including the engines, 
boilers, appurtenances and spare parts, is complete in 



85 

accordance with the contract, drawings, specifications, 
and authorized changes therein. If it is not so complete 
your report will include a detailed list of all the items 
which are incomplete. 

3. The instructions to the board will require a report of 
the power of the auxiliaries in use during the trials. You 
will arrange for such determination of the power ex- 
pended in driving these auxiliaries and of the water con- 
sumption, as it is practicable to make before the trial; 
also submit reports of all capacity tests made by the con- 
tractors on their own initiative or required to be made by 
the specifications, and any further reports which will en- 
able the board to estimate fairly the power of same on 
trial. 

4. You will please direct the contractors to tabulate the 
tests of all steam gauges made in the presence of yourself 
and furnish a copy for the use of the trial board to show 
all gauge corrections. 

5. You will direct the contractors to set the boiler 
safety valves by actual steam pressure at 295 pounds by a 
gauge which has been accurately standardized. This test 
will be made in your presence, and you will furnish to the 
trial board a certificate concerning the same. 

6. Your attention is directed to the eleventh clause of 
the contract which requires a careful record of the amount 
of coal and water used on the various trials and of the 
amount of fuel oil consumed on trial (e). You are di- 
rected to see that the coal for use on these trials is bagged 
and weighed as required by the contract, and that the 
arrangements for measuring fuel oil and water are per- 
fected and their efficiency thoroughly tested before report- 
ing finally ready for the official trials. Careful calibra- 
tions will be made and reported of the fuel oil and water 
measuring tanks at observed temperatures. Graduated 
measuring strips will be fitted at gauge glasses, so that the 



86 

contends in gallons can be quickly and accurately read at 
any height of fuel oil or water in tanks. 

7. The bureau incloses herewith one copy of the Syn- 
opsis of Machinery and Hull Data, which you will please 
fill out as regards constants and fixed data mentioned, as 
far as can be ascertained, previous to the trial. These 
synopsis sheets will be forwarded to the bureau for trans- 
mission to the trial board. 

8. You will direct the contractors to fit in the engine 
room, and in a convenient place for reading, additional 
mechanical revolution counters as supplied by the bureau, 
one for each shaft, with electrical connections for marking 
the reading when passing ranges. These counters &re for 
use during all the trials. Every precaution must be taken 
to have the motion of these counters absolutely reliable. 
The gear for operating them must be independent of that 
connected with the regular engine counters. After the 
trials this special gear will be removed from the ship. 

9. It is directed that an electrical bell be fitted at the 
counters above mentioned, at the station for reading tor- 
sion meters, at the engine-room gauge board, and at the 
water-measuring tanks. These bells are to be on one 
circuit, separate from that connecting to the additional 
mechanical revolution counters, and connected with a 
portable contact maker on the upper forward bridge. 
The bells should be large and reliable, in order that there 
may be no doubt about their successful operation. A 
colored electric light will be placed in each fire room on a 
circuit, with push button near the counter station in star- 
board shaft alley, for use in making signals to fire rooms. 

10. You will furnish a certificate of calibration of tor- 
sion meters and full report of calibration of shafts, with 
calculations of S. H. P. constants for the torsion meters 
used. 



87 

11. At least one month before the date of preliminary 
trials, drawings, etc., should be submitted in duplicate, 
one copy for the bureau and one for the trial boar 
ing arrangement of measuring water, fuel oil, and make-up 
feed. Also drawings in duplicate, giving complete infor- 
mation as to the location of all gauges, pyrometers, ther- 
mometers, special mechanical count* *ioti mi 
etc., that is, of all instruments which will have to be read 
on trials, and also the location of water and fuel-oil meas- 
uring tanks. 

] 68. The Inspector of Machinery or an assistant will be 
directed to report to the trial board and will be present 
during the trial. He will furnish the board with such 
information as it may require, in addition to the above- 
named reports, and will afford the board every facility 
for the examination of the drawings and papers concern- 
ing the vessel. During the trial this officer will regard 
himself as the direct representative of the bureau. While 
refraining from any action contrary to the wishes of the 
board he will report any circumstances or occurrences 
that he deems of importance direct to the bureau. 

After the trial the inspector may be directed to make the 
post-trial examination and report results and recommen- 
dations to the trial board and bureau. When post-trial 
inspection is made by members of engineering trial board 
the inspector will be present and will afford such officers 
all assistance and information available. 

CARE OF MACHINERY AFTER INSTALLATION. 

169. When the work has so far progressed that the 
vessel is ready for steam, the Inspector of Machinery will 
see that nothing is done on board that will injuriously 
affect any part under cognizance of this bureau, and that 
all parts of the machinery after installation are protected 
from injury or improper exposure. Instances have 



occurred where the boilers of a vessel were materially 
injured by the excessive use of cylinder oil in the sub- 
contractors 7 tests of the dynamo engines; in other cases 
corrosion has been discovered which begun before vessel 
was delivered. In particular, care must be exercised that 
no such occurrences take place. 

Special attention is to be paid to see that apparatus is 
properly cleaned and taken care of after having passed 
acceptance tests. 

INSPECTION OF COAL BUNKERS AND FUEL-OIL 
TANKS. 

170. When the coal bunkers and fuel- oil tanks of a 
vessel building are completed and before coal or oil are 
put into the same they shall be inspected by the Inspector 
of Machinery and the Superintending Constructor, who 
shall prepare a joint report upon the condition of the same. 

OUTFIT— INFORMATION FROM YARD SUPPLY- 
ING SAME. 

171. When it is necessary to secure information con- 
cerning articles of outfit on Steam Engineering allowance 
list in connection with provision for stowage, etc., the 
Inspector of Machinery will request such information 
direct from the Commandant of the yard supplying the 
outfit. 

PERSONS DETAILED FOR DUTY IN CONNEC- 
TION WITH SHIPS BUILDING. 

172. All persons who are ordered to report to Inspectors 
of Machinery for duty in connection with vessels building 
will, besides such duty as may be regularly assigned them, 
make themselves thoroughly familiar with the ship in 
question, and in particular with the department or 
branch to which they are to be assigned. 



89 

They should familiarize themselves with the machinery 
of the vessel and bring such suggestions as may be deemed 
pertinent to the attention of the inspector. They will in 
every way possible assist the inspector in the work of 
inspection and in such tests of the machinery as may be 
made under his supervision. 

The particular orders of officers and men assigned to 
duty in connection with vessels nearing completion may 
at times require special treatment. It must always be 
borne in mind that these instructions do not supersede 
any specific orders issued by the department. All per- 
sons who have been directed to report to the inspector are 
subject to his orders and directly under his control and 
direction. 

COMMANDING OFFICERS AS GENERAL IN- 
SPECTORS. 

173. Officers who are to command a vessel are fre- 
quently ordered before delivery as general inspector of a 
vessel. When an officer is ordered as general inspector 
for a vessel nearing completion, the inspector will afford 
such officer all possible information relative to the ma- 
chinery of his ship, and will take under advisement all 
suggestions or recommendations by him. and will cooper- 
ate to secure as far as practicable any desirable improve- 
ments suggested by the general inspector. Matters of 
correspondence emanating from officers detailed for duty 
in connection with a vessel building will pass through the 
general inspector for thb vessel, and all matters suggested 
by or through the general inspector of a vessel, which re- 
late to matters under cognizance of this bureau, must pass 
through the Inspector of Machinery before any action can 
be taken by the bureau. 

Should occasion require, general inspectors will be 
suitably informed of this requirement of the bureau. 



90 

THE SENIOR ENGINEER OFFICER. 

174. The officer ordered as senior engineer officer of a 
vessel building will, when his orders permit, have general 
charge (under the inspector) of all other officers or en- 
listed men assigned to the engineer department of a vessel 
previous to commissioning. 

Clerical work for the engineer department in compila- 
tion of details of organization and preparation of station 
bills, will be done by the officers or petty officers assigned 
to duty in connection with the vessel. The force of the 
inspector of machinery may assist in drafting work for 
station bill, etc., where it does not interfere with their 
regular duties. 

All suggestions, recommendations, or criticisms of the 
machinery installation under cognizance of this bureau 
made b3 7 the officer ordered as senior engineer must pass 
through the inspector of machinery before being acted 
upon by the bureau. 

DELIVERY OF VESSEL. 

175. When contractors propose to deliver a vessel 
they will make request through the Inspector of Ma- 
chinery and the Superintending Constructor. These re- 
quests will be forwarded to the bureau with full comment 
from the inspector as to proper completion of all matters 
for which the contractors are responsible, and with a list 
of uncompleted work, and a recommendation from the 
inspector as to the advisability or inadvisability of de- 
livery at the time requested. 

VESSEL COMPLETED; REPORTS. 

176. When a vessel is delivered to the Government, the 
Inspector of Machinery will furnish to the bureau and to 
the commanding officer of the vessel the following reports : 

(a) Report of uncompleted work. 



91 

(h) A complete inventory of the spare parts, stores, 
and tools furnished by the contractors, arranged accord- 
ing to titles alphabetically. This list, without prices, 
will be previously prepared and submitted to the con- 
tractors, with the request that they fill in said lists so as 
to make them show the numbers of each item supplied, 
the unit cost, and the total cost of same; and, for the 
purpose of showing that these entries have been made by 
the contractors, to state on the face of the list that the 
prices and numbers have been entered by them and are 
correct. Attached to this inventory there will be a sup- 
plementary list, showing the location where the various 
spare parts, tools, etc., are stowed. Where articles are 
packed, each package or box must be numbered, and this 
supplementary list will show the contents of each package. 

(c) Any special information relative to the engineer 
department not included in items (a) and (6) which, in 
the opinion of the inspector of machinery, will be of 
special value to future engineer officers of the vessel. 
This report will not be required if all such information is 
contained in the remark book. 

(d) Remark book (for commanding officer only). 

177. Reports for the commanding officer may be sent to 
the commandant of the yard where delivered with a 
letter stating that they are for the commanding officer. 
An additional copy of the inventory, item (b), will be 
furnished the commandant of the yard for the general 
storekeeper. 

RESERVATION FOR UNCOMPLETED WORK AT 
TIME OF DELIVERY. 

178. When a vessel is delivered the inspector will sub- 
mit his recommendation as to amount of reservation 
that should be made to cover cost of each item of uncom- 
pleted or unsatisfactory work for which the contractors 
are responsible. Instructions to this effect are sent to 
inspectors after the report of preliminary trial is received. 



92 

WORK REPORTED BY TRIAL BOARD, 

179. As soon as report of preliminary trial of a vessel 
is received the bureau will forward one copy to the 
inspector of machinery for his information and files; a 
copy is also furnished the contractors by the Navy 
Department (usually via Bureau of Construction and 
Repair). 

In the absence of other instructions the inspector will 
take up with the contractors all matters of uncompleted 
or unsatisfactory work reported by the trial board and 
for which the contractors are responsible with a view to 
securing their completion at as early a date as possible. 
Special instructions concerning these matters are, how- 
ever, usually sent to the inspector by the bureau 

UNCOMPLETED WORK AFTER DELIVERY. 

180. Work for which the contractors are responsible, 
other than supplying of spare parts, etc., uncompleted 
at time of delivery will usually be completed at a navy 
yard and the cost of same charged to contractors. Con- 
tractors may, however, be given the option of doing this 
work when practicable. 

DEFECTIVE WORK DISCOVERED AFTER DE- 
LIVERY. 

181 . Reports of defective work discovered after delivery 
will be forwarded to the inspector for reference to the 
contractors, in order that, when practicable, the con- 
tr actors' representative may have an opportunity to 
examine and comment upon the matter. 

Such defects discovered after delivery will usually be 
repaired at a navy yard or by the ship's force and charged 
to the contractors, but where practicable the contractors 
may be permitted to make the repair should they desire 
to do so. 



Part XI. 

FINISHED DRAWINGS AND BOOKLET PLANS. 

FINISHED DRAWINGS. 

182. The drawings of the completed machinery and 
booklet plans, prepared as required by the specifications, 
must be in accordance with finished work, as installed. 
A certificate from the Inspector of Machinery, as to the 
correctness of each drawing, will appear on its face. A 
blank space at least 3 inches wide by 2 inches in height 
must be left in the lower right-hand corner of each draw- 
ing for the bureau's stamp and number. 

The drawings will be numbered and indexed as follows: 

1 . The finished drawings will be numbered in the lower 
right-hand corner as shown on sample blue print which will 
be furnished by the bureau on request. 

2. The index number and group letter, differing for 
each vessel, will be furnished on application to the Bureau 
of Steam Engineering, and these index numbers and 
group letters will be placed in their proper position, as 
indicated, on all finished drawings. 

3. The file numbers, which will also be placed on draw- 
ings by the contractors before transmission to the bureau, 
will be consecutive, beginning with number 01 (for exam- 
ple, 01, 02, 03, 010, etc.), the sequence number in each 
case being preceded by zero to distinguish finished draw- 
ings from preliminary tracings and working drawings. 

4. The tracings will be so numbered, as far as practi- 
cable, as to form groupings in accordance with the gen- 
eral outline of groupings in the weight instructions from 
this bureau. 

5. Upon application from the Inspector of Machinery, 
a blank index book for each set of drawings will be fur- 
nished for the use of contractors. These index books will 

(93) 



94 

be filled out and one copy will be transmitted with the 
set of finished drawings to the bureau for approval. After 
such approval is received and after all corrections and 
additions have been made and entered which may be 
directed by the bureau, additional prints being furnished 
as desired ; the sets of blue prints referred to oy the ma- 
chinery specifications, corrected in accordance with the 
finally approved finished drawings, will be sent to the 
destinations given by the Bureau of Steam Engineering, 
each with its own completed index book. 

This work will be done by the contractors as required 
by the specifications. 

183. Where two or more vessels on the same design 
are built together by one firm, the number of tracings, 
Vandykes, or blue prints required for one vessel only will 
be required, except that there must be a complete set of 
prints on cloth supplied to each vessel. Where there are 
differences in detail separate tracings will be required for 
each vessel. 

184. The inspector will take adequate measures to have 
a set of blue prints of the finished drawings or a set of blue 
prints of the working drawings and the booklet plans, 
ready for issue to the vessel at the time she is placed in 
commission and will report to the bureau any probable 
delay in furnishing these plans. Extensive and entirely 
unnecessary delay is sometimes encountered in the deliv- 
ery of these drawings and booklets. In cases where the 
data sheet that accompanies the booklet plans can not 
be supplied before delivery, the contractors may be 
authorized to make up the booklets with a stub sheet to 
which the data sheet may be. attached when received. 
The booklets supplied the vessel will then be furnished 
without the data sheet, which will be forwarded to the 
vessel as soon as completed. The booklets to be for- 
warded to the bureau will not be sent on until the data 
sheet has been attached. 



Part XII. 

CIRCULAR LETTERS, CORRECTIONS, AND 
ADDITIONS. 

CIRCULAR LETTERS. 

185. Circular letters will be issued by the bureau from 
time to time (1) correcting or adding to the ''General 
Instructions to Inspectors of Machinery"; (2) giving 
information concerning bureau practice in mechanical 
and (3) in electrical work. 

1S6. These circular letters will be issued in serial 
numbers under each of the above headings, and at least 
two copies will be sent to each office. One file of these 
copies will be kept in a loose-leaf binder for ready refer- 
ence; the other copies may be filed or used at discretion. 

187. Circular letters referring to inspection of material 
will continue to be issued as at present and in continu- 
ance of the present numbers. These letters are of a 
different series from those mentioned above and are 
distinguished by the letter U S " following the file number. 

CORRECTIONS TO GENERAL INSTRUCTIONS. 

188. These, when received, will be entered in the Index 
of Corrections, in front pages of this book, and the para- 
graph affected will have a notation placed on margin 
abreast of it. These corrections will be issued in serial 
numbers in addition to the letter file number. A supply 
of extra copies will be kept at the bureau for issue on 
request. 

(95) 



96 

CIRCULAR LETTERS OF BUREAU PRACTICE. 

189. These will be issued on separate sheets or leaflets 
on official letter-paper size so that they may be filed in 
loose-leaf binders or kept in the correspondence files, or 
both, as may be desirable. The number of copies sup- 
plied to each office will be in accordance with a mailing 
schedule which may be modified from time to time, 
modifications being made as requested. A limited supply 
of extra copies will be kept on hand at the bureau for 
issue. 

190. These circular letters are specially issued to cover 
the inspection of new work, as an instruction and guide 
to elaborate and explain to inspection force what should 
be required under the specifications, and to define where 
possible what practice, methods, and character of w-ork 
are acceptable to the bureau, in order to secure uniform- 
ity and preserve a record of bureau practice which may 
be readily available for reference. They will also be used 
as a guide in connection with repair and overhaul work 
done at navy yards or elsewhere, and as matters of infor- 
mation to engineer departments on board naval vessels. 

191. These letters are not "specifications" but are 
outlines of what the Bureau of Steam Engineering con- 
siders good practice on points considered, and contain 
information and explanations for the guidance of in- 
spectors in carrying out the requirements of the specifi- 
cations. The requirements as laid down in these letters 
and in any of the bureau or Navy Department standards 
may be made part of the machinery specifications or con- 
tract for any work done under cognizance of this bureau 
when so designated. In all cases they are to serve as a 
guide for the inspection force, but should cases arise 
where these circular letters differ from the requirements 
of the contract or the specifications, the contract or 
specifications will govern. 



97 

ADDITIONS AND MODIFICATIONS TO CIRCU- 
IiAR LETTERS OF BUREAU PRACTICE. 

192. Inspectors, officers of the machinery divisions of 
navy yards, and other officers are urged to forward to the 
bureau any information on subjects which may be 
applied to extend and improve the information contained 
in the citrcular letters of bureau practice. In order that 
the information contained may be made as accurate and 
tiseful as possible, any defects or desirable alterations 
should also be reported. 

Note. — Material covered in paragraphs 27-31 and 33-100 of 1910 edi- 
tion of " General Instructions to Inspectors of Machinery," has been 
omitted from this edition. The information and directions contained 
in these paragraphs will be embodied in " Circular Letters of Bureau 
Practice" to be issued later. The above paragraphs of 1910 edition 
will be followed till circular letters covering these subjects are issued. 

36161—14 7 



I^DEX. 

Par. 

Addresses, record kept 3S 

Allotment for boilers 151 

for machinery 144 

Analysis, chemical 128 

Annual report 150 

Application for payment 147 

extension of time 152 

Assistant inspectors, duties 28 

instruction of 4 

warrant officers 31 

Auxiliary machinery, orders for 157 

Bills for payment, contractors 147, 14S 

Blowers, test of 134 

Blue prints required by inspector 55 

submission of 5S 

Board on changes, conference with contractors 72 

estimate of change 73 

information supplied to 70 

personnel of 69 

information supplied to 70 

Boilers building under subcontract 151 

condition on turning over 169 

of 135 

payment for 151 

Book remark 61 

Booklet plans 1S4 

Briefii 42 

Builders' trials 164 

Bureau practice 17 

circular letters 1 

Bureau standards 15 

Bureau, work under other 74 

Calibration of torsion meters 161 

Care of machinery after installation 169 

Centers of gravity 125 

Changes and developments 63 

board on, personnel of 69 

estimates for 66 

initiation of 64 

in specifications 

overhead charge allowance 67 

(99) 



100 

Par. 

Changes record kept by inspector 68 

suggested by contractors 65 

Chemical analysis. . . 128 

Circular letters 185 

Circulating pump, test of 137 

Civilian employees, rules and duties 32 

Classification societies 21 

Clerical force 37 

Coal bunkers and oil tanks, inspection of 170 

Coal-measuring arrangements 163 

Cognizance „ 81 

aeroplanes 116 

air-compressing machinery , 95 

ash ejectors, expellers, and piping 96 

blacksmith shop 118 

bulletin boards 101 

bulkheads, water-tight joints 91 

combined oil and electric lighting fixtures 114 

conduct, etc 108 

distribution panel on submarines 115 

drainage system 84 

electric semaphore for signaling Ill 

electric water heater 113 

electric work 106 

engine counters 105 

engine and fire room ventilation 83 

floors, ladders, gratings 92 

foundry Ill 

fresh-water system 86 

fuel-oil system , 100 

general lines of division , 78, 82 

general workshop 117 

gyro compass 112 

heating and ventilating 98 

illuminating sets U0 

matters relating to other bureaus 55 

motor boats 104 

reducing and stop valves 89 

refrigerating machinery 94 

sea connections and valves 90 

shaft struts and stern tubes 93 

smoke-pipe guys 99 

steam launches 103 

submarines 102 

tanks, etc 97 

ventilation engine and fire rooms 83 

voice tubes, panels, etc 109 

of work, general lines 78, 81, 82 

Cooperation between members of inspection force 35 

Commanding officers as general inspector of vessel - 173 

Comment of inspector on drawings, required 



101 

Par. 

Commercial practice 22 

Completion of vessel, reports 176 

Contract 12 

Contract plans 13 

Contract price, division of 144 

Contractors, intercourse with 7 

plant, famil arity with 8 

Copies of letters, extra 45 

Corrections and additions to instructions 185,188 

Correspondence, affecting matters under other bureaus 55 

manner of keeping 41-42 

relating to subcontractors 53 

Credit for material 149 

Defective work discovered after delivery 181 

Delivery of vessel 175 

Departure from specifications 62 

Design, requirements of 20 

Developments and changes 63 

Distilling apparatus, test of 136 

Division of contract price 144 

work between bureaus 77 

work in office of inspector 25 

Drafting force, duties of 33 

Drawings and plans, inspection and approval 56 

submission of 58 

electrical 59 

finished 182 

numbering of. 58 

Electrical inspector 29 

Electrical drawings 59 

tests 141 

Engineering information filed 19 

Equipment, trial 160 

Estimate of change, form No. 17 73 

Evaporating plant, test of 136 

Extension of time, request for 152 

Finished drawings 182 

material 156 

tracings 182 

weights 126 

Forced-draft blowers, test of 134 

Form 102, preparation of 144 

Form file 18 

Foundation of machinery, examination into 75 

Fuel-measuring arrangements 163 

Furniture and outfit 121 

General inspector of machinery 24 

for vessels 173 

requirements of work 16 



102 

Par. 

Hours of work 39 

Hydraulic tests 132 

Inclosures with correspondence 51 

Indexing drawings 182 

Indorsements 47 

Indorsement stamps 48 

Information of improvements and methods of work, to be reported 6 

for inspectors, sources of 10, 11 

sent out by bureau 17 

Inspection of coal bunkers and fuel-oil tanks 170 

force, organization of 27 

outside 34 

of material 156-159 

before approval of drawings 158 

work, division of 25 

Inspectors, assistant 28 

comment on correspondence 50 

electrical 30 

suggestions from 6 

of machinery, definition of duty 1 

reference to others 23 

Installation of electric plant, report 145 

Instruction of assistants 4 

Insulating test 142 

Insurance 151 

Intercourse with contractors 7, 9 

Journal office 120 

letters, briefing of 42 

referred to contractors , 52 

List of office equipment, annual report 121 

Machinery, care of after installation 169 

testof.... 130 

Material and apparatus inspected at other places 156, 157 

boiler 151 

credit for 149 

and design 20 

finished, orders for 156 

inspection before approval of drawings 158 

rejected at building yard 159 

tests of 127 

unfinished, orders for 153 

Matters relating to other bureaus ". 55 

Monthly report of progress 145 

Motors for machine tools, test - — 143 

IV umbering of drawings 58 

' Office Journal 120 

hours 39 

outfit and furniture 121 



103 

Par. 

Officers ordered to vessels nearing completion 172 

Orders for material 153 

Organization of inspection force 26 

Overhead charges, allowance in estimates on changes 67 

Outfit, information from yard supplying same 171 

Outside inspection force 34 

Payments, application for, on boilers 147 

Plans, electrical 59 

standard 60 

submission of 58 

Preliminary trial, reports readiness for 165 

Pressure tests on shore 131 

Propellers, spare 166 

Pump, circulating, test of 137 

Ratings and advancement 40 

Record of changes kept by inspector 58 

Record of work inspected at other places 68 

Reference to other inspectors 23 

Refrigerating plant, test of 138 

Rejected material at building yard 159 

Remark book 61 

Removability of fittings 79 

Report, annual 150 

of installation of electric plant 145 

of progress, monthly. 145 

table of 54 

of trial board 167 

vessels completed 176 

Reservation for uncompleted work 178 

Senior engineer officer detailed 174 

Sources of information for inspectors 10, 11 

Spare propellers 166 

Specifications 14 

changes and departures from 62 

and bureau practice 16, 17, 189 

requirements of 16, 20 

Stamps, indorsement 48 

on letters 46 

Standard plans ' 15 

sheets, suggestions 15 

tracings ' 60 

Standards, Bureau 15 

Subcontractors 53 

Submission of plans 58 

Succession of responsibility in absence of inspector 5 

Suggestions from inspectors 6 

Tests of apparatus 132 

on board 140 

boilers 135 



104 

Par. 

circulating pump 137 

electrical 141 

evaporating plant 136 

F. D. blowers 134 

insulating 142 

of machinery 130 

of material 127 

motors for machine tools 143 

physical and chemical analysis 128 

pressure on shore 131 

of refrigerating plant 138 

Torsion meters, calibration of 161 

Tracings finished 182 

standard 60 

Trials builders 164 

Trial board, reports to 167 

work reported by 179 

Trials and trial equipment 160 

preliminary, readiness for 165 

post trial examination 168 

presence of inspector 131, 164, 168 

Unfinished material 153 

orders for 153 

Uncompleted work at time of delivery, reservation for 178 

Urgent matters 49 

Vessel completed, reports 176 

delivery of 175 

Visitors 122 

Waivers of material 129 

Warrant officers 31 

Water-measuring arrangements ... 162 

Weight force 36 

instructions 36, 123 

Weights of machinery 123 

of material. , 36 

contained water '. 124 

finished 126 

Work, defective discovered after delivery ; 181 

inspected elsewhere, record of 58 

reported by trial board 179 

uncompleted, done at navy yard 180 

under other bureaus : 74 

Yearly return, office outfit 121 

O 



